Low voltage air circuit-breakers SACE Emax

Technical catalogue 

604019/011 en 

March '99 

ABB SACE L.V. 

Low voltage air circuit-breakers 

SACE Emax 

690 V • 800-6300 A • 40-150 kA (380/415 V)

GENERAL INDEX 

Introduction 

Technology and innovation 

for advanced plant 

engineering requirements 2 

More efficient, safer 

installations 4 

“Intelligent design” 6 

Design tools 8 

Compact switchboards 9 

Optimal warehouse 

management 10 

A design dedicated 

to Quality and respect 

for the environment 12 

Standards, approvals, 

certifications and 

company Quality System 14 

Main characteristics 

Electrical specifications 18 

Construction 

characteristics 20 

Identification of circuitbreakers 

26 

Versions and 

connections 27 

SACE PR111 and PR112 

microprocessor-based 

overcurrent releases 28 

Derived versions 32 

Special versions 35 

Accessories 36 

Installation in 

switchboards 

Installation in 

switchboards 38 

Change in the rated 

uninterrupted current 

in relation to 

temperature 42 

Derating in altitude 48 

Current-limiting and 

specific let-through 

energy curves for circuitbreakers 

E2L - E3L 49 

Overcurrent 

releases and 

relative accessories 

Overcurrent protection 

with SACE PR111 


releases 52 

Trip curves of circuitbreakers 

with SACE 

PR111 releases 56 


with SACE PR112 


release 58 

Trip curves of circuitbreaker 

with SACE 

PR112 releases 62 

SACE PR010/K 

signalling unit 67 

SACE PR010/T 

configuration test unit 68 

Accessories 

Circuit-breaker and 

fixed part accessories 70 

Spare parts and 

retrofitting 84 

Applications of the 

circuit-breaker 

Primary and secondary 

distribution 86 

Selectivity tables 90 

Earth fault protection 91 

Switching and protection 

of transformers 96 

Protection of lines 97 


of generators 98 


of asynchronous 

motors 100 


of capacitors 102 

Overall dimensions 

Fixed circuit-breaker 

Withdrawable circuit- 

104 

breaker 108 

Mechanical interlock 

Circuit-breaker 

113 

accessories 114 

Electrical circuit 

diagrams 

Operating state shown 118 

Circuit diagram 

symbols 119 

Electrical circuit 

diagrams 120 

Ordering codes 

SACE Emax E1 

Circuit-breaker 128 









SACE Emax E1/MS 

Switch-disconnector 150 









SACE Emax CS 

Isolating truck 162 

SACE Emax MTP 

Earthing switch 163 

SACE Emax MT 

Earthing truck 164 

SACE Emax PF 

Fixed parts 165 

Circuit-breaker and 

fixed part accessories 167 

Microprocessor-based 

releases and current 

transformer 172 

Conversion kit for 

fixed circuit-breaker 

or fixed parts 173

Introduction 

Characteristics 

Installation in switchboards 

Releases 

Accessories 

Applications of the 



Circuit diagrams 

Ordering codes

Technology and innovation 

for advanced plant engineering requirements 

The constant increase in the technological and functional complexity 

of electrical installations makes it essential for every 

component - particularly those such as protection circuitbreaker 

s which are crucial to safety - to offer the highest levels 

of continuity of service and reliability combined with minimal 

maintenance requirements. 

ABB SACE L.V. has designed the new generation of SACE Emax 

low voltage air circuit-breakers in line with these advanced 

plant engineering requirements, and featuring high resistance 

to mechanical, electrical and thermal stresses. 

SACE Emax circuit-breakers represent the logical functional 

complement to SACE Isomax S moulded case circuit-breakers 

and have, like them, been designed for integration and perfect 

co-ordination with the different lines of ABB low voltage products. 

2 

The new series 

has been designed 

in accordance with 

the most modern 

ergonomical criteria, 

and the evidence 

for this can be seen in the 

prize awarded to the 

circuit-breakers at the 

Hanover Forum Design. 

The design and manufacture of the new circuit-breakers follow 

advanced ergonimical criteria, in line with the solutions 

adopted for selection and use of SACE Isomax S switchgear - 

entirely to the benefit of all catagories of customers and users. 

Two aspects received particular attention during design: the 

modular versatility and physical dimensions of the different 

sizes, reduced from the six of the SACE Megamax series to 

four. 

SACE Emax circuit-breakers are available in five different models: 

E1, E2, E3, E4 and E6, each of which benefits from the interchangeability 

of the various different versions of moving parts 

(with different breaking and rated current capacities) for the 

same fixed part. The rated uninterrupted currents range from 

800 to 6300 A. 

The breaking capacities, which have been improved in relation 

to the previous series, range from 40 kA to 150 kA (380/ 

415 V a.c.).

The principal benefits of the 

new SACE Emax circuitbreakers 

are as follows: 

• Smaller overall dimensions 

• Dimensions (height and 

depth) the same across the 

entire series 

• Common accessories for 

the entire range 

• The same service releases 

for a.c./d.c. applications 

• Shared components - e.g. 

the opening and closing 

releases are the same 

• Easy assembly of the current 

transformers (CT) 

• Accessories fitted without 

need for cabling, reducing 

stock levels and optimising 

“logistical” costs 

• Distances from exposed 

conductive parts to be respected 

zero for withdrawable 

circuit-breakers 

• Simplified construction of 

electrical switchboards. 

Briefly, high safety, quality, 

and rational design characteristics 

combined with compact 

dimensions are the results 

of the totally innovative 

design criteria which lie behind 

SACE Emax circuitbreakers. 

Emax0398 Emax0399 

Emax0403 



3


More efficient, safer installations 

SACE Emax circuit-breakers not only ensure the high level of 

reliability needed to achieve the necessary service continuity, 

but also offer a high level of safety for everyone operating on 

the installation, both during functional customisation and 

during inspection and maintenance. 

The risk of carrying out incorrect and dangerous sequences 

of operations is impeded by the presence of suitable locks. 

Each sequence is only enabled if all the conditions which ensure 

it can be carried out safely and correctly have been respected. 

In any case, the state of the switchgear is automatically taken 

to the highest safety level for the operator performing the 

operation. 

Accessories are installed from the front of the circuit-breaker 

without cabling and the accessories section is separate from 

the power circuit. 

4 


Going into greater detail, the main solutions adopted to protect 

operators in the various different operating conditions are 

as follows: 

• Double insulation, to ensure total segregation of the seatings 

for accessories from the power circuit. 

• Key locks or padlock devices, to control enabling of opening 

and closing operations and/or racking in and out 

• Racking out with the door closed, to enable the circuitbreaker 

to be racked out and into its fixed part with the switchboard 

door closed. 

• Anti-insertion locks, to prevent mobile parts being inserted 

in fixed parts with different rated currents or when the circuit-breaker 

is closed.


SACE Emax circuit-breakers 

offer outstanding reliability in 

terms of both mechanical 

and electrical life, and in the 

field of low voltage apparatus 

up to 6300A, represent 

the maximum in terms of performance, 

whilst with regard 

to their structural characteristics, 

their indices allow a 

high level of sturdiness to be 

achieved. 

5

Electrical installation designers choosing the new SACE Emax 

circuit-breakers can offer a vast range of solutions that enable 

them to satisfy the specific demands of every user without 

obliging them to adapt their needs to the switchgear available. 

When looking through the detailed SACE Emax catalogue of 

the complete and highly specialised range, the versatility and 

possibility of optimal sizing become immediately apparent. 

The rated current and breaking capacity levels have been 

studied to ensure optimal sizing in all plant configurations. In 

addition to this, the designer and end user benefit from a further 

important performance feature: the possibility of integrating 

SACE Emax circuit-breakers in intelligent control and supervision 

systems. 

The need to optimise the management of electrical installations 

is increasingly being recognised today, particularly where 

power consumption, control, monitoring, diagnostics and, consequently, 

maintenance operations are concerned. 

Benefiting from the know-how acquired with its other series of 

circuit-breakers, ABB SACE L.V. has specially designed and 

Emax0336 “Intelligent design” 

6 


manufactured a family of microprocessor-based releases, 

called SACE PR111 and PR112, that are able to provide a 

wide range of important dedicated functions for SACE Emax 

circuit-breakers. 

The SACE PR112 release, in particular, features a 16 bit microprocessor 

and 12 bit analogue to digital converter, making its 

performance even more accurate.

offer load control, self-test and information transmission capabilities 

in addition to the traditional protection functions, enabling 

them to be interfaced with centralised control and supervision 

systems. ABB SACE L.V. offers all the components 

needed to build systems that are tailored to each installation, 

from field units to front ends (with standard communication 

protocols), from actuators to control systems. 

As a result, the work of specifiers and designers is considerably 

simplified when it comes to choosing the technical characteristics 

and performance required. 

All this is thanks to the fact that the selection criteria are common 

to several families of circuit-breakers and use intuitive 

and easy-to-read codes and symbols. 

The new circuit-breakers build on the successful experience 

acquired with the SACE Isomax S family, continuing a tradition 

of switchgear designed and manufactured paying particular 

attention to use and user interface-related aspects, with obvious 

advantages in terms of ergonomics, clarity and speed of 

identification. 

Level 1 

MV SWITCHBOARD 

Level 2 

Level 3 

Optic fibre 


SD-P2 SD-P2 SD-P2 

PR512 

Copper cable 

PR112 

Emax0473 The circuit-breakers fitted with microprocessor-based releases 

PR211 

Personal Computer 

for supervision and control 

electro-optical converters 4 max 

LV SWITCHBOARD 

Range of Emax, Megamax, 

Isomax S and LV circuit-breakers 

not provided with 

microprocessor units 

PR1 

PR211 

SD-D1 / SD-D2 

7

Emax0483 Design tools 

Three highly useful work tools are available 

for designing and sizing electrical 

installations (DOC software, slide rule kit, 

guide to L.V. installations) which facilitate 

calculations, ensure the installation conforms 

to the relevant standards and decrease 

the risks of errors. They include 

information on different low voltage products 

such as: air circuit-breakers, 

moulded case circuit-breakers, modular 

circuit-breakers, contactors, thermal relays, 

fuse switch-disconnectors. 

The two main software products developed 

by ABB SACE L.V., called D.O.C. 

and C.A.T.s, have been put together on a 

single CD-Rom. 

D.O.C. (Design Optimization & Computation) 

is an optimized sizing system for 

low voltage industrial installations and is 

able to recommend the best design selections 

for cables, busbars and protection 

devices. It allows the design engineer 

to develop clear and complete design 

documentation rapidly in compliance with 

the most recent standards. 

The C.A.T.s (Computer Aided Technical 

selection) is both an electronic catalogue 

and a technical instrument for helping to 

select and add accessories to each single 

circuit-breaker. By means of guided 

paths, the most suitable apparatus for the 

requirements of individual installations can 

be selected, configured and ordered. Detailed 

documentation is also available, containing 

the instruction, maintenance and 

installation manual and the technical construction 

drawings for each product. 

There are some utility programs which 

8 



also allow generation of orthogonal views, 

configured in Autocad format, as well as 

drawing of the trip curves of the various 

releases. 

Four different coloured slide rules form 

the ABB kit, enabling rapid electrical installation 

sizing calculations. They can be 

used to calculate: 

• The sizing of cables and calculation of 

short-circuit currents (yellow slide rule) 

• Verification of cable protection against 

direct contact and short-circuits (orange 

slide rule) 

• Selective and back-up co-ordination 

(green slide rule) 

• The sizing of motor lines and transformer 

outgoing feeders (blue slide rule). 

The calculation methods and data on the 

slide rules have been obtained from the 

CEI, IEC and NFC Standards in force and 

from plant engineering practice. 

The guide to low voltage installations 

is a summary of the legal and technical 

regulations based on current standards 

regarding the design, sizing and installation 

of electrical systems. The guide 

considers the user installation starting 

from the power supply (MV/LV substation) 

in category 1 systems.

The need to build increasingly compact 

switchboards to satisfy the architectural 

and technical requirements of modern 

buildings while simultaneously rationalising 

the related construction process is fully 

met by the new SACE Emax circuit-breakers 

which have a constant depth and height 

from 800 through to 6300 A. 

The new ABB SACE L.V. “air” circuitbreaker 

makes it possible to standardise 

the support structures for the circuit-breakers, 

considerably facilitating construction 

of the switchboards themselves. 

The reduced width of the circuit-breaker 

offers the benefit of more rational use of 

the space available and makes it possible 

to build compact switchboards both in the 

case of standard 400 mm (up to 2000 A) 

and standard 1000 mm columns. 

Moreover, the fact that a wide range of terminals 

is available for the entire series 

makes it possible to build switchboards 

mounted against walls or switchboards 

which can be accessed from behind with 

rear connections. 

W Fixed Withdrawable 

3/4 POLI 3/4 POLI 

E1 - E2 296 / 386 324 / 414 

E3 404 / 530 432 / 558 

E4 566 / 656 594 / 684 

E6 782 / 908 810 / 936 

Emax0421 Compact switchboards 


Fixed 

418 mm 

Withdrawable 

461 mm 

W 

Fixed 302 mm 

Withdrawable 396.5 mm 

9

Optimal warehouse management 

A single range of accessories serves the 

entire SACE Emax series of circuit-breakers. 

This standardisation enables optimal 

warehouse management while simultaneously 

ensuring every solution possible 

can be customised. Electrical distributors 

and every customer who has to manage 

maintenance and spare parts for large 

installations consequently benefits from 

simpler warehouse management. 

The ease with which accessories are installed 

makes modular fitting operations 

fast and safe, allowing even the end customer 

to carry out the customising required 

in each different phase of the life 

of an installation. 

The designer’s job is made much easier 

since the switchgear can be chosen well 

in advance, preventing any overlapping 

with the phase for finalising the construction 

details. 

The current transformers for the different 

rated currents of the releases are very 

simple to change, meaning the end customer 

can also carry out this operation. 

SACE PR111 and PR112 microprocessor-based 

releases are, likewise, easy 

to change and are also interchangeable. 

Moreover, conversion kits are available 

for the different terminal solutions and versions 

of the circuit-breaker, allowing a 

very high level of warehouse rationalisation. 

The fixed parts for withdrawable circuitbreakers 

are common to each model, irrespective 

of the rated current and breaking 

capacity. 

10 


Emax0479



A design dedicated to Quality 

and respect for the environment 

The new circuit-breakers have been developed 

in an environment where quality 

research has always been an overriding 

commitment. A commitment that 

involves every company function at ABB 

SACE L.V. and has made it possible to 

12 

obtain prestigious international marks of 

recognition. 

The Company Quality System has been 

certified by RINA (Registro Italiano 

Navale - Italian Naval Register), one of 



the most prestigious international certification 

bodies, and conforms to the ISO 

9001 Standard, while the ABB SACE L.V. 

test laboratory has been accredited by 

SINAL. 

Commitment to care for the environment 

is another priority at ABB, confirmed by 

the fact that the Frosinone factory’s environmental 

management system has 

been certified by RINA. 

ABB SACE L.V., the first industrial company 

in the electro-mechanical sector in 

Italy to obtain this, thanks to an ecologycentred 

revision of its manufacturing 

process, has been able to reduce its raw 

material consumption and machining 

scrap by 20%.



ABB SACE L.V.’s commitment to protecting 

the environment can also be seen in 

the product Life Cycle Assessments 

(LCA) carried out in its Research Centre. 

The materials, processes and packaging 

used are chosen with a view to optimising 

the real environmental impact of 

each product, including its energy efficiency 

and recyclability. 

13

and company Quality System 

Emax0344 Standards, approvals, certifications 

The certification of conformity with the above-mentioned product 

Standards is carried out following European Standard EN 45011 

by the Italian certification body ACAE (Associazione per la 

Certificazione delle Apparecchiature Elettriche - Association 

for the Certification of Electric Appliances), recognised by the 

European body LOVAG (Low Voltage Agreement Group). 

The ABB SACE L.V. Quality System conforms to the International 

Standard ISO 9001 (quality assurance model for design, 

development, manufacture, installation and service) and the 

equivalent European Standard EN ISO 9001 and Italian Standard 

UNI EN ISO 9001. 

The third party certifying body is RINA-QUACER. 

ABB SACE gained its first certification, valid for three years, in 

1990 and has now received certification for the third time. 

14 


SACE Emax circuit-breakers 

and their accessories conform 

to the International 

Standards IEC 947, EN 

60947 (harmonised in the 17 

CENELEC countries), CEI EN 

60947 and IEC 1000, and 

conform to the relevant CE 

directives: 

– “Low Voltage Directives” 

(LVD) No. 73/23 EEC 

– “Electromagnetic compatibility 

Directive” (EMC) No. 

89/336 EEC. 

The apparatus complies with 

the specifications of the regulations 

for on-board installations 

and is approved by the 

following Naval Registers: 

– RINA (Italian Naval Register) 

– Det Norske Veritas 

– Bureau Veritas 

– Germanischer Lloyd 

– Loyd’s Register of Shipping 

– Polskj Reiestr Statkow



ISO 9001 

15

INDEX 

Main characteristics 

Electrical specifications 18 

Construction characteristics 20 

Identification of circuit-breakers 26 

Versions and connections 27 


overcurrent releases 28 

Derived versions 32 

Special versions 35 

Accessories 36 

17

Electrical specifications 

Specifications common to the entire range 

Voltages 

Rated service voltage Ue 690 ~ / 250 – [V] 

Rated insulation voltage Ui 1000 [V] 

Rated impulse withstand voltage Uimp 12 [kV] 

Service temperature -5 … +70 [°C] 

Storage temperature -40 … +70 [°C] 

Frequency f 50-60 [Hz] 

Number of poles 3-4 

Versions Fixed - Withdrawable 

Circuit-breaker model 

18 


E1 E2 

Performance level B B N L 

Currents 

Rated uninterrupted current Iu Iu 

[A] 800 1600 1250 1250 

(at 40 °C) [A] 1250 2000 1600 1600 

[A] 2000 

[A] 

[A] 

Capacity of neutral pole on four-pole circuit-breakers [%Iu] 100 100 100 100 

Rated ultimate short-circuit Icu 220/230/380/400/415 V~ [kA] 40 40 65 130 

breaking capacity 

440 V ~ [kA] 40 40 65 110 

500/660/690 V ~ [kA] 36 40 55 85 

250 V — [kA] 36 40 55 – 

Rated service short-circuit Ics 220/230/380/400/415 V~ [kA] 40 40 65 130 

breaking capacity 440 V ~ [kA] 40 40 65 110 

500/660/690 V ~ [kA] 36 40 55 65 

250 V — [kA] 36 40 55 – 

Rated short-time (1s) Icw (1 s) [kA] 36 40 55 10 

withstand current Icw (3 s) [kA] – 40 40 – 

Rated short-circuit making Icm 220/230/380/400/415 V~ [kA] 84 84 143 286 

capacity (peak value) 440 V ~ [kA] 84 84 143 242 

500/660/690 V ~ [kA] 75,6 84 121 187 

Utilisation category (in accordance with CEI EN 60947-2) B B B A 

Isolation behaviour (in accordance with CEI EN 60947-2) 


• • • • 

Microprocessor-based releases for a.c. applications 

Operating times 

• • • • 

Closing time (max) [ms] 80 80 80 80 

Break time for IIcw (max) 


[ms] 30 30 30 12 

Fixed: H = 418 mm - D = 302 mm L (3/4 poles) [mm] 296/386 296/386 

Withdrawable : H = 461 mm - D = 396.5 mm L (3/4 poles) [mm] 324/414 324/414 

Weights (c.breaker complete with releases and CT, excluding accessoires) 

Fixed 3/4 Poles [kg] 42/50 46/55 46/55 45/53 

Withdrawable 3/4 Poles (including fixed part) [kg] 65/80 72/89 72/89 70/87 

(1) without intentional delays 

E1 B E2 B-N E2 L 

Rated uninterrupted current (at 40 °C), Iu 

Mechanical life 

[A] [A] 800 1250 1250 1600 2000 1250 1600 

with regular routine maintenance [No. operations x 1000] 25 25 25 25 25 20 20 

Frequency [Operations per hour] 60 60 60 60 60 60 60 

Electrical life (440 V ~) [No. operations x 1000] 10 10 15 12 10 4 3 

Frequency [Operations per hour] 30 30 30 30 30 20 20 




E3 E4 E6 

N S H L S H H V 

2500 1250 1250 2000 4000 3200 5000 3200 

3200 1600 1600 2500 4000 6300 4000 

2000 2000 5000 

2500 2500 6300 

3200 3200 

100 100 100 100 50 50 50 50 

65 75 100 130 75 100 100 150 

65 75 100 110 75 100 100 150 

65 75 85 85 75 85 (*) 100 100 

65 75 75 – 75 100 100 100 

65 75 85 130 75 100 100 125 

65 75 85 110 75 100 100 125 

65 75 85 65 75 85 (*) 100 100 

65 75 75 – 75 100 100 100 

65 75 75 15 75 100 100 100 

65 65 65 – 65 65 – – 

143 165 220 286 165 220 220 330 

143 165 220 242 165 220 220 330 

143 165 187 187 165 187 165 187 

B B B A B B B B 

• • • • • • • • 

• • • • • • • • 

80 80 80 80 80 80 80 80 

70 70 70 70 70 70 70 70 

30 30 30 12 30 30 30 30 

404/530 566/656 782/908 

432/558 594/684 810/936 

68/80 68/80 68/80 67/79 95/115 95/115 140/170 140/170 

100/125 100/125 100/125 100/120 147/190 147/190 210/260 210/260 

(*) The performance at 500 V is 100 kA 

E3 N-S-H E3 L E4 S-H E6 H-V 

1250 1600 2000 2500 3200 2000 2500 3200 4000 3200 4000 5000 6300 

20 20 20 20 20 15 15 15 15 12 12 12 12 

60 60 60 60 60 60 60 60 60 60 60 60 60 

12 10 9 8 6 2 1,8 7 5 5 4 3 2 

20 20 20 20 20 20 20 10 10 10 10 10 10 


19

Emax0417 Construction characteristics 

20 

Structure 

The structure of the circuit-breaker, which 

is made out of sheet steel, is extremely 

compact and allows the dimensions to 

be significantly reduced. Safety is increased 

by adopting double insulation 

for the live parts and total segregation 

between the phases. 

The dimensions are characterised by 

having the same height and depth for 

all the circuit-breakers in each version.

is suitable for installation in 500 mm deep 

switchboards. The width of 324 mm (up 

to 2000 A) for the withdrawable version 

allows the switchgear to be used in 

switchboard compartments 400 mm 

Emax0418 The depth of the withdrawable version 

wide. These compact dimensions also 

allow them to replace any models of air 

circuit-breakers from earlier series. 

21

Construction characteristics 

GSEM0098 

GSEM0099 

22 

9 

10 

11 

9 

10 

11 

Selective circuit-breaker 

E1 E1 B, B, E2 E2 B-N, B-N, E3 E3 N-S-H, N-S-H, E4 E4 S-H, S-H, E6 E6 H-V 

H-V 

Current-limiting circuit-breaker 

E2 E2 L, L, E3 E3 L 

L 

8 

8 

7 

7 

6b 6a 5b 

5a 

6 

2 

4 

3 

1 

5 

2 

4 

3 

1 

Utilisation category (selective or currentlimiting 

circuit-breakers) 

The selective (not current-limiting) circuit-breakers are classified 

in class B. It is important to know their Icw values in relation 

to any possible delayed operations in the event of shortcircuits. 

Current-limiting circuit-breakers E2L and E3L belong to class 

A. The short-time current Icw is not very important for these 

circuit-breakers and is necessarily low due to the operating 

principle on which they are based. The fact that they belong to 

class A does not preclude the possibility of obtaining the necessary 

selectivity (e.g. current-type or time-type selectivity) 

within the Icw rated short-time withstand current thresholds. 

The special features of current-limiting circuit-breakers are also 

worthy of emphasis. In fact, they allow: 

– significant reduction of the peak current in relation to the 

prospective value; 

– drastic limitation of the specific let-through energy (see the 

curves on page 49). 

The resultant benefits are: 

– a reduction in electrodynamic stresses; 

– a reduction in thermal stresses; 

– savings in the sizing of cables and busbars; 

– the possibility of coordination with other circuit-breakers in 

the series for back-up protection or selectivity. 

1 Sheet steel supporting structure 

2 Current transformer for protection release 

3 Pole group insulating box 

4 Horizontal rear terminals 

5-5a Plates for fixed main contacts 

5b Plates for fixed arc-breaking contacts 

6-6a Plates for moving main contacts 

6b Plates for moving arc-breaking contacts 

7 Arcing chamber 

8 Terminal box for fixed version - Sliding contacts for 

withdrawable version 

9 Protection release 

10 Closing and opening control of circuit-breaker 

11 Closing springs


7 

8 

3 

2 

1 

9 

6 

5 

4 

Fixed parts of 

withdrawable 

circuit-breakers 

The fixed parts of withdrawable 

circuit-breakers have 

shutters for segregating the 

fixed contacts when the circuit-breaker 

is withdrawn 

from the compartment. 

These can be locked in their 

closed position using padlock 

devices. 

1 Sheet steel supporting 

structure 

2 Single earthing pliers 

mounted on the left for E1, 

E2 and E3, double earthing 

pliers for E4 and E6. 

3 Safety shutters (degree of 

protection IP20) 

4 Terminal supporting 

insulating base 

5 Terminals (rear, front or 

flat) 

6 Contacts signalling 

connected, isolated, 

isolated for test (to order) 

7 Sliding contacts 

8 Padlock device for safety 

shutters (to order) 

9 Fixing points (4 for E1, E2, 

E3 and 6 for E4, E6) 

23


Construction characteristics 

Operating mechanism 

The operating mechanism is of the stored energy type, operated 

using pre-charged springs. 

The springs are charged manually by operating the front 

lever or using a geared motor, supplied on request. 

The opening springs are charged automatically during the closing 

operation. 

With the operating mechanism fitted with shunt closing and 

opening releases and the geared motor for charging the 

springs, the circuit-breaker can be operated by remote control 

and, if required, co-ordinated by a supervision and control 

system. 

The following operating cycles are possible without recharging 

the springs: 

– starting with the circuit-breaker open and the springs 

charged: closing-opening 

– starting with the circuit-breaker closed and the springs 

charged: opening-closing-opening. 

The same operating mechanism is used for the entire series 

and is fitted with a mechanical and electrical anti-pumping 

device. 

24 

I 

O 


O 

I 

O


Fixed version 

2 

1 

3 

5 

7 

9 

Withdrawable version 

15 

2 

1 

11 

5 

7 

9 

12 

14 

4 

6 

8 

10 

3 

4 

6 

8 

10 

13 

Operating and signalling 

parts 

1 Trade-mark and model of circuitbreakers 

2 SACE PR111 or PR112 release 

3 Pushbutton for manual opening 

operation 

4 Pushbutton for manual closing 

operation 

5 Lever for manual closing spring 

charging 

6 Electrical rating plate 

7 Mechanical signalling device for circuitbreaker 

open “O” and closed “I” 

8 Signal for springs charged or 

discharged 

9 Mechanical signal for protection 

release tripped 

10 Operation counter 

11 Key lock in open position 

12 Key lock and padlock in isolatedwithdrawn 

position 

13 Devices for the racking-in/racking-out 

operations 

14 Terminal box (only for fixed version) 

15 Sliding contacts (only for withdrawable 

version) 

25


Identification of circuit-breakers 

26 

GSEM0005x 

E 

Where the dimensions of the circuit-breakers 

are concerned, they are divided into four 

sizes, each with the same external dimensions. 

There is one model in each size, with 

Series Model Rated ultimate short-circuit 

breaking capacity (480V a.c.) 

B 

N 

S 

H 

V 

L 

40 kA / selective 





130 kA / limiting 

For example, code SACE E3 N 25 identifies a circuit-breaker in series E with 

the following electrical specifications: 

Model 3, Icu = 65 kA, Iu = 2500 A. 

the exception of size 1, which has two sizes 

with different electrical specifications. 

The circuit-breakers are identified using the 

following code: 

Rated uninterrupted 

current 

08 

12 

16 

20 

25 

32 

40 

50 

63 

800 A 

1250 A 

1600 A 

2000 A 

2500 A 

3200 A 

4000 A 

5000 A 

6300 A 


Versions and connections 

All the circuit-breakers are available in fixed and withdrawable 

three and four-pole versions. 

Each model of circuit-breaker has terminals made of silverplated 

copper bars which have the same dimensions irrespective 

of the rated currents of the circuit-breakers. 

The fixed parts of each model of withdrawable circuit-breakers 

are the same for every rated current and breaking capacity 

of the related moving parts. 

GSEM0009 

GSEM0006 

HORIZONTAL REAR 

TERMINALS 

HORIZONTAL REAR 

TERMINALS 

FIXED CIRCUIT-BREAKERS 

GSEM0010 

GSEM0007 

VERTICAL REAR 

TERMINALS 

VERTICAL REAR 

TERMINALS 

A solution with gold-plated terminals is available for special 

needs involving the use of the circuit-breakers in corrosive 

environments. The fact that different types of terminals are 

available makes it possible to build switchboards that can be 

mounted against walls or accessed from the rear with rear 

connections. 

The circuit-breakers can be fitted with different combinations 

of top and bottom terminals to meet special installation needs. 

GSEM0011 

GSEM0008 

FRONT 

TERMINALS 

WITHDRAWABLE CIRCUIT-BREAKERS 

FRONT 

TERMINALS 

GSEM0012 

FLAT 

TERMINALS 

27


overcurrent releases 

The overcurrent protection for alternating 

current installations is provided by 

two types of microprocessor-based releases 

in the SACE PR111 and PR112 

series which can be installed as alternatives 

on SACE Emax circuit-breakers: 

• SACE PR111 with protection functions 

only 

• SACE PR112 with protection, current 

measuring and dialogue functions. 

The protection units can be three-phase 

or three-phase with neutral depending 

on the type of circuit-breaker used (three 

pole, three-pole with external neutral or 

four pole). 

The protection unit comprises: 

• 3 or 4 current transformers (CT) depending 

on the number of circuitbreaker 

poles; the fourth CT may be 

external 

• one protection unit which can be either 

a SACE PR111/P or PR112/P 

• an opening solenoid which acts directly 

on the circuit-breaker operating 

mechanism (always supplied with the 

protection unit). 

The SACE PR112 release is available 

with a dialogue unit, to be specified on 

ordering, for remote control and communication 

with a centralised system. The 

protection and dialogue unit thus takes 

the code SACE PR112/PD. 

The main characteristics of these microprocessor-based 

releases are: 

• operation without the need for an external 

power supply 

• microprocessor technology (8 bit for 

SACE PR111 and 16 bit for SACE 

PR112) 

• high precision 

• sensitive to the true r.m.s. value of the 

current 

28 


• neutral normally set to 50% of the setting 

for the phases, with the possibility 

of setting it to 100% (to order on 

E1, E2, E3 and E4 only). 

The main performances which distinguish 

the releases are indicated in the 

following table.

Protection functions 

Overload protection with inverse 

long time-delay trip 

Selective short-circuit protection with inverse 

or definite short time-delay trip 

Instantaneous short-circuit protection with 

adjustable trip current setting 

Earth fault protection 

Thermal memory for functions L and S 

Measurements 

Currents (in phases, in neutral, of earth fault) 

Events marked with moment when they occur 

Events stored in chronological order 

Counting of number of operations and contact wear 

Residual 

Remote setting of protection function, unit configuration 

and communication parameters 

Transmission of measurements, states and alarms from 

circuit-breaker to system 

Transmission of events and maintenance data from 

circuit-breaker to system 

Alarm and release due to release temperature rise 

Alarm due to microprocessor fault 

Parameters set using DIP switches 

Parameters set using keys and liquid crystal display 

Source ground return 

Event marking and data storage 

Communication with centralised supervision 

and control system (using dialogue unit) 

Self-test 

User interface 

Alarm signals for functions L and S 

Complete management of pre-alarms and alarms for 

all protection and self-monitoring functions 

Enabling key for use in “READ” (consultation) or “EDIT” 

(consultation and setting) mode 

Load control (with auxiliary unit) 

Connection-disconnection of loads in relation to the current passing 

through the circuit-breaker 

Zone selectivity 

Can be activated for protection functions S and G 

Mini0351 

SACE PR111 

Mini0350 


29

Emax0327 Mini0351 


overcurrent releases 

Overcurrent release 



Mini0350 Versions available 

30 

PR111/P PR111/P PR111/P 

PR112/P PR112/P PR112/PD PR112/PD

CURRENT TRANSFORMER SETTINGS (In) 

C.Breaker Rated 

type current (Iu) R250 R400 R800 R1250 R1600 R2000 R2500 R3200 R4000 R5000 R6300 

E1B 800 A 

1250 A 

E2B 1600 A 

2000 A 

E2N 1250 A 

1600 A 

2000 A 

E2L 1250 A 

1600 A 

E3N 2500 A 

3200 A 

E3S 1250 A 

E3H 1600 A 

2000 A 

2500 A 

3200 A 

E3L 2000 A 

2500 A 

E4S 4000 A 

E4H 3200 A 

4000 A 

E6H 5000 A 

6300 A 

E6V 3200 A 

4000 A 

5000 A 

6300 A 

31

Derived versions 

The derived versions are available for all the circuit-breaker 

models. They are identified by the code of the circuit-breaker 

from which they are derived, completed with the code for their 

related versions. 

The dimensions are the same as those of the circuit-breakers 

on which they are based. 

32 


Code of derived version 

Switch- Isolating Earthing switch Earthing 

disconnector truck with making capacity truck 


MS CS MTP MT 

E1 E1 B/MS E1/CS 12 E1/MTP E1/MT 

E2 E2 B-N/MS E2/CS 20 E2/MTP E2/MT 

E3 E3 N-S/MS E3/CS 32 E3/MTP E3/MT 

E4 E4 S-H/MS E4/CS 40 E4/MTP E4/MT 

E6 E6 H/MS E6/CS 63 E6/MTP E6/MT 



Switch-disconnector MS 

This version differs from its related 

automatic circuit-breaker solely in not 

having an overcurrent release fitted. 

The switch-disconnectors are available 

both in fixed and withdrawable versions. 

The electrical characteristics of the 

switch-disconnectors are shown in the 

table below (to IEC standards 947-3). 


E1 B E2 B E2 N E3 N E3 S E4 S E4 H E6 H 

MS MS MS MS MS MS MS MS 

Rated current Iu (40 °C) [A] 800 1600 1250 2500 1250 4000 3200 5000 

1250 2000 1600 3200 1600 4000 6300 

2000 2000 

2500 

3200 

Rated service 

voltage 

Ue 50-60 Hz 

[V~] 

[V –] 

690 

250 

690 

250 

690 

250 

690 

250 

690 

250 

690 

250 

690 

250 

690 

250 

Rated insulation 


Ui [V~] 1000 1000 1000 1000 1000 1000 1000 1000 

Rated impulse 

withstand voltage 

Rated 

Uimp [kV] 12 12 12 12 12 12 12 12 

short-time Icw (1 s) [kA] 36 40 55 65 75 75 100 100 

withstand current (3 s) [kA] – 40 40 65 65 65 65 – 

Rated making 

capacity 

(peak value) 

Icm 220…440V~ [kA] 

500…690V~ [kA] 

75,6 

75,6 

84 

84 

121 

121 

143 

143 

165 

165 

165 

165 

220 

187 

220 

187 

33

Derived versions 

34 



Isolating truck - CS 

withdrawable circuit-breaker, with all the 

Earthing switch with making capacity - MTP 

This version is based on the moving part 

of the corresponding withdrawable circuit-breaker 

without the overcurrent releases 

and with the top or bottom isolating 

contacts replaced by connections 

that short circuit the phases through the 

circuit-breaker to earth. The earthing 

switch with making capacity is available 

with top or bottom isolating contacts. 

Earthing truck - MT 

Emax0357 This version is derived from the related 

This version is similar to the isolating 

truck, with the exception that the bottom 

or top isolating contacts are replaced 

with connections that are connected in 

a short circuit and earthed. The earthing 

truck is available with bottom or top 

isolating contacts to suit the fixed part 

of the model. 

breaking and operating mechanism 

parts replaced by simple connections 

between the top and bottom contacts. 

It is used as a no-load isolator in cases 

where this use is envisaged in the installation. 

The earthing circuit is sized for a shorttime 

current equal to 60% of the maximum 

Icw of the circuit-breaker on which 

it is based (IEC 439-1). 

The earthing switch is inserted in the 

fixed part of a withdrawable circuitbreaker 

to earth the top or bottom terminals 

before carrying out inspection or 

maintenance operations on the external 

circuit in safe conditions. It should be 

used in cases where earthing of installations 

with residual or recovery voltages 

could occur. 

The earthing circuit is sized for a shorttime 

current equal to 60% of the maximum 

Icw of the circuit-breaker it is 

based on (IEC 439-1). 

The truck is temporarily racked into the 

fixed part of a withdrawable circuitbreaker 

to earth the top or bottom terminals 

before carrying out maintenance 

operations on the external circuit when 

no residual voltages are envisaged.


Special versions 

SACE Emax circuit-breakers for voltages up to 1000V in alternating current 

SACE Emax circuit-breakers can be supplied, 

in the special version, for rated 

service voltages up to 1000V in alternating 

current. 

The circuit-breakers in this version are 

three-pole and four-pole version. 

SACE Emax/E circuit-breakers are particularly 

suitable for installation in mines, 

petrochemical plants and for traction. 

The table below shows the electrical 

characteristics of the range. 

Interruttore E2B/E E2N/E E3H/E E4H/E 

Rated uninterrupted 

current 

Iu [A] 1600 2000 1250 1600 2000 1250 1600 2000 2500 3200 3200 4000 

Rated service Ue [V] 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 


Rated ultimate breaking 

capacity under short-circuit Icu [kA] 20 20 30 30 30 50 50 50 50 50 65 65 

Rated service breaking 

capacity under short-circuit Ics [kA] 20 20 30 30 30 50 50 50 50 50 65 65 

Rated short-time 

withstand current Icw [kA] 20 20 30 30 30 50 50 50 50 50 65 65 

Other versions 

On request, SACE Emax circuit-breakers 

can be provided in special versions 

suitable for particularly aggressive 

ambients (SO 2 /H 2 S) and for anti-seismic 

installations. 

defined with the abbreviation of the 

standard range (rated service voltage up 

to 690V a.c.) plus “/E” and are derived 

from the corresponding standard SACE 

Emax circuit-breakers of which they keep 

the versions and accessories. 

The range of SACE Emax circuit-breakers 

for applications up to 1000V in alternating 

current is available in the fixed 

and withdrawable version, both in the 

35

Accessories 

36 


E1 … E6 E1 … E6 

Automatic circuit-breaker Switch-disconnector 

Version 

Shunt opening/closing release 

Fixed Withdrawable Fixed Withdrawable 

SOR Test Unit 

Undervoltage release 

Delay device for undervoltage release 

Geared motor for automatic charging 

of closing springs 

Mechanical signal 

of overcurrent releases 

Mechanical and electrical signal 

of overcurrent releases tripped 

Electrical signal for circuit-breaker 

open/closed 

Electrical signal for circuit-breaker 

connected/isolated for test/isolated 

Contact for signalling 

closing springs charged 

Contact for signalling 

undervoltage release energised 

Current transformer for the circuit-breaker 

external neutral conductor 

Homopolar toroid for the earthing conductor 

of the main power supply 

Terminal box for fixed version circuit-breaker 

Sliding contacts for withdrawable 

version circuit-breaker 

Mechanical operation counter 

Key lock or padlock devices in open position 

Circuit-breaker lock in connected-isolated 

for test-isolated position 

Anti-insertion lock for circuit-breakers 

of different models 

Padlock devices for fixed part shutters 

Compartment door mechanical lock 

Protection for opening and 

closing pushbuttons 

IP54 door protection 

Interlock between circuit-breakers 

Lifting plate 

Racking out crank handle 

Flange for compartment door 

= optional 




= accessory supplied as standard

CONTENTS 


Installation in switchboards 38 

Change in the rated uninterrupted current 

in relation to temperature 42 

Derating in altitude 48 

Current-limiting and specific let-through energy 

curves for circuit-breakers E2L - E3L 49 

37

Modular design 

The circuit-breakers in the SACE Emax series have been made 

following modular design criteria to facilitate their installation 

and integration in L.V. electrical switchboards, giving them the 

same depth and height for every model while simultaneously 

achieving a significant reduction in their overall installation dimensions. 

Furthermore, the front metal shield of the circuit-breaker is identical 

for the entire series. This simplifies the construction of the 

Emax0334 Installation in switchboards 

38 

switchboard doors since only one type of drilling is required 

and makes the front of the switchboard the same for all sizes. 

SACE Emax circuit-breakers are suitable for Power Centre 

switchboards and make it easy to comply with the segregation 

requirements of the IEC 439-1 and CEI EN 60439-1 Standards.

Number of poles 

The choice of the number of poles for circuit-breakers which 

simultaneously provide switching, protection and isolation functions 

in three phase installations depends on the type of electrical 

system (TT, TN-S, TN-C, IT) and the type of user or, more 

generally, whether it features a distributed or non-distributed 

neutral. 

THREE-POLE 

PEN L1 L2 L3 

CIRCUIT-BREAKERS 

For TN-C systems (interruption 

of the neutral is not admissible 

because it also acts 

as the protection conductor). 

For users that do not use the 

neutral (e.g.: asynchronous 

motors) and, generally, for 

lines without neutral (non-distributed 

neutral). 

PE 

L1 L2 L3 

Emax0331 Choosing the type of circuit-breaker 

SACE PR111-PR112 


FOUR-POLE CIRCUIT-BREAKERS 

In all other cases, with exceptions 

for the IT system 

(see CEI Standards 64-8/ 

473.3.2.2). 

Current transformers can be 

installed on the external neutral 

of five-wire systems (TN- 

S) with 3-pole circuit-breakers 

PE 

PE 

N L1 L2 L3 

THREE-POLE CIRCUIT-BREAKERS WITH EXTERNAL 

NEUTRAL 

N L1 L2 L3 



Fixed or withdrawable 

version 

The fixed version of the circuit-breaker 

has more compact 

dimensions than the 

withdrawable version. It is 

recommended for installations 

that can tolerate service 

interruptions in the event 

of faults or routine maintenance. 

The withdrawable version of 

the circuit-breaker is recommended 

for: 

– applications that can only 

tolerate brief interruptions 

due to faults or routine 

maintenance: 

– dual lines, one of which is 

a standby for the other, with 

a single circuit-breaker for 

each pair. 

39


Connecting the main circuitbreaker 

circuits 

When designing switchboards, one must 

always bear in mind the problem of making 

the most rational connections between 

the circuit-breaker and main 

busbar system and the busbars to the 

users. The SACE Emax series offers 

switchboard experts a range of options 

to satisfy different circuit-breaker connection 

requirements. 

The figures at the side show a number 

of indications for terminal selection. 

Degrees of protection 

A number of solutions have been 

adopted on SACE Emax circuit-breakers 

to achieve degree of protection IP22 

for fixed or withdrawable circuit-breakers 

excluding their terminals, and IP30 

for their front parts using a flange. Automatic 

shutters have been designed for 

the fixed parts of withdrawable circuitbreakers 

which can be locked using 

padlock devices to allow maintenance 

of the load side or power-supply side of 

the fixed part. 

40 

Horizontal rear terminals - For switchboards 

with access from the rear 

Front terminals - For switchboards 

mounted on walls with access from 

the front only 

In addition, a transparent protective 

cover is available on request, which 

completely segregates the front part of 

the circuit-breaker, taking the degree of 

protection to IP54 while still leaving the 

front panel and protection release with 

its related indications fully visible. 

IP22 Fixed or withdrawable circuitbreaker, 

excluding terminals. 

IP30 Front parts of circuit-breakers (using 

flange). 

IP54 Fixed or withdrawable circuitbreaker 

fitted with transparent protective 

cover to be fixed on the front 

of the switchboard (on request). 

ASEM0031 

ASEM0033 


Vertical rear terminals - For switchboards 

with access from the rear 

Flat rear (only withdrawable version) 

- For switchboards with access from 

the rear 

ASEM0032 

ASEM0034

The IEC 439-1 and CEI EN 60439-1 Standards prescribe calculations 

for determining the heat dissipation of ANS (nonstandard) 

switchboards which require the designer to consider 

the following: 

– the overall dimensions 

– the rated current of the busbars and connections and their 

related power loss values 

– the power loss of the switchgear fitted in the switchboard. 

The following table provides information on the circuit-breakers. 

Where other equipment is concerned, please consult the 

catalogues of the relative manufacturers. 

Emax0342 Power loss 

C.-breaker Iu 

Power loss 

Fixed Withdrawable 

3/4 Poles 3/4 Poles 

[A] [W] [W] 

E1 B 800 65 95 

1250 150 230 

E2 B-N 1250 70 130 

1600 115 215 

2000 180 330 

E2 L 1250 105 165 

1600 170 265 

E3 N-S-H 1250 60 90 

1600 85 150 

2000 130 225 

2500 205 350 

3200 330 570 

E3 L 2000 215 330 

2500 335 515 

E4 S-H 3200 235 425 

4000 360 660 

E6 H-V 3200 170 290 

4000 265 445 

5000 415 700 

6300 650 1100 

Note 

The same Standards prescribe type tests for AS 

switchboards (standard factory-manufactured 

switchgear), including those for maximum 

temperature rise. 

41


in relation to temperature 

Temperature derating of SACE Emax series 

The circuit-breakers can operate at higher temperatures than 

their reference temperature (40 °C) in certain installation conditions. 

In these cases the current-carrying capacity of the 

switchgear should be reduced. 

The SACE Emax series of air circuit-breakers uses microprocessor-based 

electronic releases that offer the benefit of great 

operating stability when subjected to temperature changes. 

The tables below show the current-carrying capacities of the 

circuit-breakers (as absolute values and percentage values) 

in relation to their rated values at T = 40 °C. 

42 

Iu [A] 

1400 

1200 

1000 

800 

600 

400 

200 

0 

E1 1250 

E1 800 


Temperature E1 800 E1 1250 

[°C] % [A] % [A] 

10 100% 800 100% 1250 

20 100% 800 100% 1250 

30 100% 800 100% 1250 

35 100% 800 100% 1250 

40 100% 800 100% 1250 

45 100% 800 100% 1250 

50 100% 800 100% 1250 

55 100% 800 97% 1207 

60 100% 800 93% 1163 

65 100% 800 89% 1118 

70 100% 800 86% 1075 

10 20 30 35 40 45 50 55 60 65 70 

T [°C]


Temperature E2 1250 E2 1600 E2 2000 

[°C] % [A] % [A] % [A] 

10 100% 1250 100% 1600 100% 2000 

20 100% 1250 100% 1600 100% 2000 

30 100% 1250 100% 1600 100% 2000 

35 100% 1250 100% 1600 100% 2000 

40 100% 1250 100% 1600 100% 2000 

45 100% 1250 100% 1600 100% 2000 

50 100% 1250 100% 1600 96% 1920 

55 100% 1250 99% 1580 92% 1840 

60 100% 1250 98% 1560 88% 1760 

65 100% 1250 96% 1538 84% 1680 

70 100% 1250 95% 1515 80% 1600 

Iu [A] 

3500 

3000 

2500 

2000 

1500 

1000 

500 

0 

E2 2000 

E2 1600 

E2 1250 

10 20 30 35 40 45 50 55 60 65 70 

T [°C] 

43




Temperature E3 1250 E3 1600 E3 2000 E3 2500 E3 3200 

[C°] % [A] % [A] % [A] % [A] % [A] 

10 100% 1250 100% 1600 100% 2000 100% 2500 100% 3200 

20 100% 1250 100% 1600 100% 2000 100% 2500 100% 3200 

30 100% 1250 100% 1600 100% 2000 100% 2500 100% 3200 

35 100% 1250 100% 1600 100% 2000 100% 2500 100% 3200 

40 100% 1250 100% 1600 100% 2000 100% 2500 100% 3200 

45 100% 1250 100% 1600 100% 2000 100% 2500 100% 3200 

50 100% 1250 100% 1600 100% 2000 100% 2500 96% 3066 

55 100% 1250 100% 1600 100% 1990 98% 2450 92% 2932 

60 100% 1250 100% 1600 99% 1980 96% 2400 87% 2798 

65 100% 1250 100% 1600 98% 1965 93% 2320 83% 2664 

70 100% 1250 100% 1600 98% 1950 90% 2240 79% 2528 

44 

Iu [A] 

3500 

3000 

2500 

2000 

1500 

1000 

500 

0 

E3 3200 

E3 2500 

E3 2000 

E3 1600 

E3 1250 

10 20 30 35 40 45 50 55 60 65 70 

T [°C]


Temperature E4 3200 E4 4000 

[°C] % [A] % [A] 

10 100% 3200 100% 4000 

20 100% 3200 100% 4000 

30 100% 3200 100% 4000 

35 100% 3200 100% 4000 

40 100% 3200 100% 4000 

45 100% 3200 100% 4000 

50 98% 3130 96% 3824 

55 96% 3060 91% 3648 

60 93% 2990 87% 3472 

65 91% 2915 82% 3296 

70 89% 2840 78% 3120 

Iu [A] 

7000 

6000 

5000 

4000 

3000 

2000 

1000 

0 

E4 4000 

E4 3200 

10 20 30 35 40 45 50 55 60 65 70 

T [°C] 

45




Temperature E6 3200 E6 4000 E6 5000 E6 6300 

[°C] % [A] % [A] % [A] % [A] 

10 100% 3200 100% 4000 100% 5000 100% 6300 

20 100% 3200 100% 4000 100% 5000 100% 6300 

30 100% 3200 100% 4000 100% 5000 100% 6300 

35 100% 3200 100% 4000 100% 5000 100% 6300 

40 100% 3200 100% 4000 100% 5000 100% 6300 

45 100% 3200 100% 4000 100% 5000 100% 6300 

50 100% 3200 100% 4000 99% 4960 95% 6010 

55 100% 3200 99% 3975 97% 4845 91% 5720 

60 100% 3200 99% 3950 95% 4730 86% 5430 

65 100% 3200 98% 3915 92% 4620 82% 5140 

70 100% 3200 97% 3880 90% 4510 77% 4851 

46 

Iu [A] 

7000 

6000 

5000 

4000 

3000 

2000 

1000 

0 

E6 6300 

E6 5000 

E6 4000 

E6 3200 

10 20 30 35 40 45 50 55 60 65 70 

T [°C]

As an example, the table below shows the referred values of 

the rated uninterrupted current at continuous current-carrying 

capacity in a switchboard. 

These values a given as an example and refer to apparatus in 

the withdrawable version installed in a non-segregated switchboard 

with IP20 degree of protection. 

The values refer to a maximum temperature on the terminals of 

120 °C. 

For circuit-breakers with 6300 A rated current, the use of vertical 

rear terminals is recommended. 

Vertical Terminals Horizontal and Front Terminals 

[A] [% di Iu] [mm2 ] [% di Iu] [mm2 Type Iu Continuous current- Busbar Continuous current- Busbar 

carrying capacity cross-section carrying capacity cross-section 

] 

E1B08 800 100 1x(60x10) 100 1x(60x10) 

E1B12 1250 100 1x(80x10) 100 2x(60x8) 

E2N12 1250 100 1x(60x10) 100 1x(60x10) 

E2B/N16 1600 100 2x(60x10) 100 2x(60x10) 

E2B/N20 2000 100 3x(60x10) 93 3x(60x10) 

E2L12 1250 100 1x(60x10) 100 1x(60x10) 

E2L16 1600 100 2x(60x10) 100 2x(60x10) 

E3S/H12 1250 100 1x(60x10) 100 1x(60x10) 

E3S/H16 1600 100 1x(100x10) 100 1x(100x10) 

E3S/H20 2000 100 2x(100x10) 100 2x(100x10) 

E3N/S/H25 2500 100 2x(100x10) 97 2x(100x10) 

E3N/S/H32 3200 95 3x(100x10) 90 3x(100x10) 

E3L20 2000 100 2x(100x10) 100 2x(100x10) 

E3L25 2500 100 2x(100x10) 95 2x(100x10) 

E4H32 3200 100 3x(100x10) 100 3x(100x10) 

E4S/H40 4000 95 4x(100x10) 90 6x(60x10) 

E6V32 3200 100 3x(100x10) 100 3x(100x10) 

E6V40 4000 100 4x(100x10) 100 4x(100x10) 

E6H/V50 5000 100 6x(100x10) 97 6x(100x10) 

E6H/V63 6300 93 7x(100x10) — 6x(100x10) 

47

Derating in altitude 

Up to a height of 2000 metres, the SACE Emax air circuit-breakers 

do not undergo any changes in their rated performance. 

As the altitude increases their atmospheric properties alter in 

terms of composition, dielectric capacity, cooling power and 

pressure. 

The performance of the circuit-breakers therefore undergoes 

Altitude H [m]

Current-limiting and specific let-through energy 

curves for circuit-breakers E2L and E3L 

I2t [A2s x 106 The current-limiting capacity of an automatic current-limiting 

GSSC0423 

] 

circuit-breaker indicates its level of ability to let through or make 

a current lower than the prospective fault current in short-circuit 

conditions. This characteristic of an automatic current-limiting 

circuit-breaker is represented by two different curves which 

indicate the following respectively: 

– the value of the specific energy “I 2 t” (in A 2 s) let through by 

the circuit-breaker in relation to the uninterrupted symmetrical 

short-circuit current. 

– the peak value (in kA) of the limited current in relation to the 

uninterrupted symmetrical short-circuit current. 

Specific let-through energy curves 

Is [kA] 

ls prospective symmetrical short-circuit current 

lp peak current 

l2t specific let-through energy at the voltages indicated 

A curves for maximum peak currents made (limited) at the voltages indicated 

B prospective maximum peak current curve (not limited) 

GSEM002 

GSSC0422 

Ip [kA] 

A Icc of limited peak 

B prospective Icc (peak value) 

Current-limiting curves 

Is [kA] 

49

CONTENTS 

Overcurrent releases and relative 

accessories 

Overcurrent protection with SACE PR111 

microprocessor-based releases 52 

Trip curves of circuit-breakers with 

SACE PR111 releases 56 


microprocessor-based release 58 

Trip curves of circuit-breaker with 

SACE PR112 releases 62 

SACE PR010/K signalling unit 67 

SACE PR010/T configuration test unit 68 

51



microprocessor-based releases 

SACE PR111 release 

This is the basic release for the SACE Emax series. The complete 

range of protection functions and the variety of thresholds 

and trip times offered make it suitable for protecting any 

Caption 

52 

1 2 3 

6 7 8 12 13 15 16 20 

5 4 11 9 10 14 18 17 19 

1 Alarm signal LED for protection function L 

2 DIP switches for setting current threshold I1 

3 Indication of the DIP switch positions for the values of current 

thresholds I1 

4 DIP switches for setting trip time t1 (type of curve) 

5 Indication of the DIP switch positions for the time settings 

6 Alarm signal LED for protection function S 



thresholds I2 


10 DIP switches for setting inverse time or definite time 

characteristic 

11 Indication of DIP switch positions for time settings 

type of alternating current installation. The release does not 

have any additional functions over and above its protection 

functions except some number signals. 



thresholds I3 

14 Rating plate showing the rated current of the neutral CT and the 

release serial number 



thresholds I4 


18 Indication of DIP switch positions for time settings 

19 Symbol diagram showing operation of function G 

20 Connection module with external units for testing the release and 

socket for connection to the trip test (SACE TT1 unit and SACE 

PR010/T unit)

GSEM0064 

Operation and protection functions 

t = k 

t = k 

I 2 

Power supply 

The release does not require an external power supply, being 

self-powered using the current transformers installed on the 

circuit-breaker. For it to operate, it is sufficient for at least one 

phase to be loaded at 18% of the rated current of the current 

transformers (In). 


The SACE PR111 release offers the following protection functions: 

• overload (L) 

• selective short-circuit (S) 

• instantaneous short-circuit (I) 

• earth fault (G). 

See the following section for the range of settings available. 

Overload (L) 

The inverse long time-delay trip overload protection L is of the 

type I2t = k. Eight current thresholds and 4 curves indicated by 

the letters A, B, C, D are available. Each curve is identified by 

the trip time in relation to the current I = 6 x I1 (I1 = threshold 

set). 

GSEM0065 

Selective short-circuit (S) 

The inverse short time-delay trip or definite short time-delay 

trip short-circuit protection S can be set with two different types 

of curves with a trip time that is independent of the current 

(t=k) or with a constant specific let-through energy (t = k/I2 ). 

Seven current thresholds and 4 curves indicated by the letters 

A, B, C, D are available. Each curve is identified as follows: 

– for curves (t = k) by the trip time for I > I2 

– for curves t = k/I 2 by the trip time for I = 8 x In (In = rated 

current of the current transformer). 

The function can be excluded by setting the DIP switches to 

the combination indicated by “OFF”. 

Adjustable instantaneous short-circuit (I) 

Protection function I offers 7 tripping thresholds and can be 

excluded (“OFF” position of the DIP switches). 

Earth fault (G) 

The inverse short time-delay trip earth fault protection G (which 

can be excluded) offers 7 current thresholds and 4 curves indicated 

by the letters A, B, C, D. Each curve is identified by 

the time t4 in relation to current I4 as shown in the diagram on 

the front of the release (detail 19 on page 52) 

53


microprocessor-based release 

Interface with the 

user 

The user communicates with 

the release in the trip parameter 

preparation stage by 

means of the dip switches 

described in the previous 

paragraph. 

Two LEDs (detail 1 and 6 on 

page 52) are also available 

for alarm signalling (start of 

timing) for the L and S functions 

respectively. 

Setting neutral 

Protection of the neutral is 

available at 50% in the standard 

version or at 100% (version 

which can be supplied 

on request for E1-E2-E3) of 

the rated current and of the 

phases. 

Test function 

The Test function is carried 

out by means of the pocketsized 

SACE TT1 Trip Test unit, 

fitted with a two-pole polarised 

connector housed on 

the bottom of the box, which 

allows the device to be connected 

to the TEST input 

socket on the front of SACE 

PR111/P releases. 

The SACE TT1 unit allows the 

SACE PR111/P release trip to 

be checked and the opening 

solenoid trip test. 

The device is supplied by 

means of a 12V replaceable 

battery. 

54 




Versions available 

The versions available are as follows: 

A complete test of the SACE 

PR111/P microprocessorbased 

electronic release can 

be carried out using the special 

SACE PR010/T apparatus 

by applying it to the TEST 

connector. 

All the release functions can 

be checked by means of this 

unit.

Protection functions and setting values of the SACE PR111 release 

Function Current thresholds Trip time Can be excluded Relation 

t = f (I) 

Overload I1 = 0.4 x In With current NO t = k/I 2 

protection 0.5 x In I = 6 x I1: 

0.6 x In t1 = 3 s (curve A) 

0.7 x In 6 s (curve B) 

0.8 x In 12 s (curve C) 

0.9 x In 18 s (curve D) 

0.95 x In 

1 x In 

Selective I2 = 1 x In With current YES t = k/I 2 (time-current curves I 2 t ON) 

short-circuit 2 x In I = 8 x In 

protection 3 x In t2 = 0.05 s (curve A) 

4 x In 0.10 s (curve B) 

6 x In 0.25 s (curve C) 

8 x In 0.5 s (curve D) 

10 x In 

I2 = 1 x In With current YES t = k (time-current curves I 2 t OFF) 

2 x In I > I2 

3 x In t2 = 0.05 s (curve A) 

4 x In 0.10 s (curve B) 

6 x In 0.25 s (curve C) 

8 x In 0.5 s (curve D) 

10 x In 

Instantaneous I3 = 1.5 x In Instantaneous YES t = k 

short-circuit 2 x In trip 

protection 4 x In 

6 x In 

8 x In 

10 x In 

12 x In 

Earth I4 = 0.2 x In With current I = 4 x I4 YES t = k/I 2 

fault 0.3 x In t4 = 0.1 s (curve A) 

protection 0.4 x In 0.2 s (curve B) 

0.6 x In 0.4 s (curve C) 

0.8 x In 0.8 s (curve D) 

0.9 x In 

1 x In 

55 

Mini0351

OSEM00106 

OSEM0107 

Trip curves of circuit-breakers with SACE PR111 releases 

30’ 

20’ 

10 3 

10’ 

5’ 

2’ 

1’ 

30’ 

10’ 

5’ 

2’ 

1’ 

56 

20 

6 

4 

2 

10 2 

60 

40 

20 

10 

6 

4 

2 

1 

0.6 

0.4 

0.2 

0.1 

0.06 

0.04 

0.02 

0.4 0.6 0.7 

0.95 

0.9 

0.5 0.8 1 

D 

C 

B 

A 

1.5 2 4 6 8 10 12 

0.01 

0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.80.91 1.2 1.5 2 3 4 5 6 7 8 9 10 12 15 20 25 

20 

20’ 

10 3 

6 

4 

2 

10 2 

60 

40 

20 

10 

6 

4 

2 

1 

0.6 

0.4 

0.2 

0.1 

0.06 

0.04 

0.02 

0.95 

2 3 4 6 8 10 

0.4 

0.5 

0.6 0.7 0.9 

0.8 

1 

1 

1.5 2 4 6 8 10 12 

D 

C 

B 

A 

t = K 

I 2 

I 2 t 

ON 

D 

C 

B 

A 

0.01 

0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.80.91 1.2 1.5 2 3 4 5 6 7 8 9 10 12 15 20 25 

D 

C 

B 

A 

D 

C 

B 

A 

Trip threshold 

tolerances 

L = release between 

1.05 and 1.3 I1 (in 

conformity with IEC 

947-2 standards) 

S = ± 10%; 

I = ± 20%; 

Trip time 

tolerances 

L = ± 10% ( 20% per 

l>2 x ln); 

S = ± 20%; 

I = ± 20%; 

Caption 

ln= Rated current of 

current transformers 

t = trip time

OSEM00108 

OSEM0109 

30’ 

10’ 

5’ 

2’ 

1’ 

30’ 

20’ 

10 3 

10’ 

5’ 

2’ 

1’ 

20 

20’ 

10 3 

6 

4 

2 

10 2 

60 

40 

20 

10 

6 

4 

2 

1 

0.6 

0.4 

0.2 

0.1 

0.06 

0.04 

0.02 

0.01 

0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.80.91 1.2 1.5 2 3 4 5 6 7 8 9 10 12 15 20 25 

20 

6 

4 

2 

10 2 

60 

40 

20 

10 

6 

4 

2 

1 

0.6 

0.4 

0.2 

0.1 

0.06 

0.04 

0.02 

0.2 0.3 0.4 0.6 0.8 

0.4 

0.5 

0.6 

I 

D 

C 

B 

A 

0.7 

t = K 

OFF 

0.8 

0.9 

0.9 

1 

1 

0.95 

1 

D 

C 

B 

A 

2 3 4 6 8 10 

1.5 2 4 6 8 10 12 

0.01 

0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.80.91 1.2 1.5 2 3 4 5 6 7 8 9 10 12 15 20 25 

D 

C 

B 

A 

D 

C 

B 

A 


tolerances 


1.05 and 1.3 I1 (in 

conformity with IEC 

947-2 standards) 

S = ± 10%; 

I = ± 20%; 

G = ± 20% 

Trip time 

tolerances 

L = ± 10% ( 20% per 

l>2 x ln); 

S = ± 20%; 

I = ± 20%; 

G = ± 20% 

Caption 


current 

transformers 

t = trip time 

57




SACE PR112 release 

The SACE PR112 release is a sophisticated protection system 

using microprocessor technology. It comprises the SACE 

PR112/P protection unit and, on request, a dialogue unit. In 

this case it takes the code SACE PR112/PD. 

The wide range of settings makes this protection unit ideal for 

general use in any type of installation. 

58 

8 9 10 11 12 13 

14 

Caption 

Consulting information and programming is extremely easy using 

a keyboard and alphanumeric liquid crystal display. 

An ammeter function and many additional functions are provided 

over and above the protection functions. These additional 

functions can be increased still further with the addition 

of the dialogue and signalling unit. 

7 6 5 

4 3 2 1 

1 Programming keys (for selecting parameters) 

2 Liquid crystal display 

3 Rating plate indicating the rated current of the CT and neutral 

plus the release serial number 

4 Test pushbutton (TEST) 

5 Magnetic signalling devices showing protection functions 

L, S, I, G tripped 

6 Magnetic signalling device showing excessive release case 

temperature rise (second threshold) 

7 Key for resetting the magnetic signalling devices and protection 

device tripped signalling contact (RESET) 

8 Key-operated selector switch for choosing read only mode 

(READ) or setting mode (EDIT) for the parameters 

9 Microprocessor fault LED signalling device 

10 Auxiliary power supply LED signalling device 

11 LED signalling devices showing communication in progress 

between dialogue unit and control centre. 

Not available for SACE PR112/P 

12 Pre-alarm signalling device (dedicated message on display) 

13 Alarm signalling device (dedicated message on display) 

14 Connector for connecting to external units such as SACE 

PR110/B and SACE PR010/T (additional functions).

GSEM0073 

Operation, protection functions and self-test 

t 

t = k 

t = k 

I 2 

Power supply 

The SACE PR112 release does not normally require any external 

power supplies, being self-powered from the current transformers 

(CT). For the protection and ammeter functions to operate, 

it is sufficient for at least one phase to have a current 

load equivalent to 35% of the rated current of the CTs (20% in 

cases where two phases are powered). The unit ensures full 

operation with self-powering, but by supplying an auxiliary 

power supply between 18 and 36 Vdc or between 18 and 25 

Vac, the unit can also be used with the circuit-breaker open or 

with the circuit-breaker closed, but with a single-phase current 

load of less than 35% of the rated current of the CTs. 

It is also possible to use an auxiliary power supply provided 

by the PR110/B portable battery unit (always supplied) which 

allows the protection functions to be set when the circuitbreaker 

is not self-powered. 

A wide range of setting options is available for the thresholds 

and trip times of all the functions. 

Functions S and G can operate with a time delay that is independent 

of the current (t = k) or with an inverse time delay 

(constant specific let-through energy: I 2 t = k), as required. 

Protection against earth faults can also be obtained by connecting 

the SACE PR112 to an external toroid located on the 

conductor which connects the transformer star centre to earth 

(homopolar toroid). 

I 

GSEM0074 

t 

t = k 

t = k 

I 2 

All the thresholds and trip curve delays of the protection functions 

are stored in special memories which retain the information 

even if no power is supplied. 


The SACE PR112 release offers the following protection functions: 

• overload (L) 

• selective short-circuit (S) 

• instantaneous short-circuit (I) 

• earth fault (G). (Residual or Source ground return) by means 

of a toroid installed on the earthing connection of the main 

power supply. 

• self-protection against excessive temperature rises. 

Neutral adjustment 

The neutral protection is 50% of the value set for the phase 

protection in the standard version. A version with the neutral 

protection set to 100% is available on request (for E1, E2 and 

E3 only). 

I 

59



Notes: 

(1) 21 thresholds can be selected, i.e.: I2 = 0.6-0.8-1-1.5-2-2.5-3-3.5-4-4.5-5-5.5-6-6.5-7-7.5-8-8.5-9-9.5-10 x In 

(2) 15 thresholds can be selected, i.e.: I3 = 1.5-2-3-4-5-6-7-8-9-10-11-12-13-14-15 x In. 

60 

Protection functions and setting values of the SACE PR112 release 

Function Limit Threshold Trip time Can be Relation Thermal Zone 

values steps adjustment (s) excluded t = f (I) memory selectivity 

Overload I1 = 0,01xIn (With current I = 3xI1) NO t = k/I 2 YES NO 

protection 0.4…1xIn t1 = 3-6-12-24-36-48-72- (can be 

108-144 excluded) 

Selective I2 = (1) t2 = 0-0.05-0.07-0.1-0.14- YES t = k NO YES (can be 

short-circuit 0.6…10 xIn 0.20-0.21-0.25-0.28- excluded) 

protection 0.30-0.35-0.40-0.50- 

0.60-0.70-0.75 

I2 = (1) (With current I=10xIn) YES t = k/I 2 YES NO 

0.6…10 xIn t2 = 0.05-0.07-0.1-0.14- (can be 

0.20-0.21-0.25-0.28- excluded) 

0.30-0.35-0.40-0.50- 

0.60-0.70-0.75 

Instantaneous I3 = (2) Instantaneous YES t = k NO NO 

short- 1.5…15 xIn trip 

circuit 

protection 

Earth I4 = 0.02xIn t4= 0.1-0.2-0.3-0.4-0.5-0.6- YES t = k NO YES (can be 

fault 0.2…1xIn 0.7-0.8-0.9-1 excluded) 

protection 

I4 = 0.02xIn t4= 0.1-0.2-0.3-0.4-0.5-0.6- YES t = k/I 2 NO NO 

0.2…1xIn 0.7-0.8-0.9-1 

Mini0350

Emax0350x 

Protection against excessive temperature 

The range of SACE PR112 releases allows the presence of 

abnormal temperatures which could cause temporary or continuous 

malfunctions of the microprocessor to be signalled to 

the user. 

The user has the following signals or commands available: 

– lighting up of the “Warning” LED when the temperature is 

higher than 70 °C (temperature at which the microprocessor 

is still able to operate correctly) 

– lighting up of the “Emergency” LED when the temperature 

is higher than 85 °C (temperature above which the microprocessor 

can no longer guarantee correct operation) and, 

when decided during the unit configuration stage, simultaneous 

opening of the circuit-breaker with change-over of 

the relative magnetic signal. 

Microprocessor self-diagnosis 

The range of SACE PR112 releases contains an electronic circuit 

which checks operation of the microprocessor of the protection 

unit in real time (an additional electronic circuit is provided 

for the PR112/PD unit for checking the microprocessor 

of the dialogue unit). 

In case of a temporary or continuous malfunction, the following 

two signals are activated: 

– lighting up of the “μP Fault” LED (when the SACE PR112/PD 

unit is present, the “μP Communication Fault” LED also lights 

up) 

– when there is auxiliary power supply, closure of the “μP Fault” 

contact. 

Test functions 

Following enabling on the “control” menu, the “TEST” 

pushbutton on the front of the release (detail 4) allows correct 

operation of the chain consisting of the microprocessor, opening 

solenoid and circuit-breaker to be checked. 

Within the control menu there is also the possibility of testing 

correct operation of the display, signalling LEDs, magnetic signals 

and electrical contacts supplied in all the versions of the 

PR112 release. 

By means of the front multi-pin connector (detail 14), it is possible 

to apply a Test unit called SACE PR010/T which allows 

the functions of the SACE PR111 and PR112 releases to be 

tested and checked. 

4 14 

61

GSEM00110 

GSEM0111 

Trip curves of circuit-breakers with SACE PR112 release 

30’ 

20’ 

10 3 

10’ 

5’ 

2’ 

1’ 

30’ 

10’ 

5’ 

2’ 

1’ 

62 

20 

6 

4 

2 

10 2 

60 

40 

20 

10 

6 

4 

2 

1 

0.6 

0.4 

0.2 

0.1 

0.06 

0.04 

0.02 

0.4 

0.6 

1 

1.5 2 3 4 5 6 7 8 10 

2 3 4 5 6 7 8 10 12 15 

0.01 

0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.80.91 1.2 1.5 2 3 4 5 6 7 8 9 10 12 15 20 

20 

20’ 

10 3 

6 

4 

2 

10 2 

60 

40 

20 

10 

6 

4 

2 

1 

0.6 

0.4 

0.2 

0.1 

0.06 

0.04 

0.02 

0.4 

t = k 

0.5 

1 

0.01 

0.1 0.2 0.3 0.4 0.5 0.6 0,7 0.7 0,80,91 0.80.91 1.2 1,2 1,5 2 3 4 5 6 7 8 9 10 12 15 20 

1.5 

1.5 2 3 4 5 6 7 8 10 

1.5 

2 

3 

4 

5 

6 

7 

8 

10 

12 

15 


tolerances 


1.05 and 1.3 I1 (in 

conformity with 

IEC 947-2 

standards) 

S = ± 10%; 

I = ± 15%; 

t=k/I 2 

Trip time 

tolerances 

L = ± 10% (± 20% for 

l>2 x ln); 

S = ± 20%; 

I = ± 20%; 

Caption 


current 

transformers. 

t = trip time.

GSEM00112 

30’ 

20’ 

10 3 

10’ 

5’ 

2’ 

1’ 

20 

6 

4 

2 

10 2 

60 

40 

20 

10 

6 

4 

2 

1 

0.6 

0.4 

0.2 

0.1 

0.06 

0.04 

0.02 

t = k 

0.2 0.3 0.4 0.5 0.7 

0.2 0.3 0.4 0.5 0.7 1 

1 

0.01 

0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.80.91 1.2 1.5 2 3 4 5 6 7 8 9 10 12 15 20 

t=k/I 2 


tolerances 

G = ± 15%; 

Trip time 

tolerances 

G = ± 20%; 

Caption 


current 

transformers. 

t = trip time. 

63



Communication 

The SACE PR112 release with dialogue unit (PR112/PD) is able 

to communicate with a monitoring and control system using 

two different communication protocols: ABB Insum and LON. 

Reception and transmission of information 

The SACE PR112/PD release is able to receive the opening 

and closing commands from the system and to actuate them 

using the opening and closing releases. Furthermore, it also 

receives and stores the unit configuration and programming 

parameters: 

– the protection function current thresholds; 

– the protection function curves; 

– the unit configuration parameters. 

Note: 

While the communication parameters are necessary for remote operation, 

they can only be programmed locally. 

All the information can be consulted both locally and using the 

supervision system. 

The SACE PR112 release fitted with dialogue unit is able to 

transmit the following information on the state of the circuitbreaker 

remotely: 

• protection parameters set 

• setting of the neutral protection (50% or 100%) 

• configuration setting 

• current values on the three phases, on the neutral and on 

the PE conductor 

• state of the circuit-breaker (open/closed) 

• circuit-breaker condition connected/test/withdrawn 

• state of the operating mechanism springs (charged/discharged) 

• contact wear 

• number of circuit-breaker mechanical operations 

• last interrupted current 

• state of protection functions 

• size of current transformers 

• “READ/EDIT” key position and request for local control. 

Event marking and storage function (with LON 

interface only) 

The SACE PR112/PD release keeps its time base synchronised 

with the absolute system time. Thanks to the availability of the 

absolute time, it is possible to time mark the events that occur 

in the circuit-breaker and in the SACE PR112 release itself. By 

collecting any such events which occur in the various devices 

64 

Emax0368a 

installed in the system, the supervision and control system can 

process a list of events that is important for control and analysis 

of the installation. Such an analysis can, for example, be particularly 

useful for tracing the causes of a fault. 

Events detected and time-marked: 

– all protection events; 

– all “WARNING” and “ALARM” signals; 

– all “READ” / “EDIT” change-overs; 

– all opening and closing operations. 

The above information is stored locally (PR112/PD) and made 

available to the supervision and control system. 

Note: 

The function described is available when the LON communication protocol 

is being used. When the ABB Insum protocol is being used, it is only 

possible to send the above information to the central supervision and 

control system. 

Function for storing state information 

When an auxiliary power supply is provided, the SACE PR112 

release is able to store the following information in a volatile 

memory, making it available for consultation: 

– information/data subsequent to last protection trip (currents 

interrupted, type of fault, etc.); 

– number of operations performed by the unit; 

– contact wear; 

– excessive temperature rise causing the circuit-breaker to 

open. 

This information can be read locally or sent by remote transfer.


User interface 

Four pushbuttons and an enabling key with two positions 

(“READ” and “EDIT”) are used to consult the information available 

and the parameters set in the memory of the SACE PR112 

(“READ” mode) or to program and configure the unit (“EDIT” 

mode) - all the choices are made using step-by-step menus. 

Indication LEDs 

Two LEDs on the front panel of the release are used to indicate 

pre-alarms (“WARNING”) and alarms (“ALARM”). A message 

on the display always explicitly indicates the type of event 

concerned. 

Events indicated by the “WARNING” LED: 

– unbalance between phases; 

– pre-alarm for overload (I >90%); 

1 

– first temperature threshold exceeded (70 °C); 

– distorted waveform; 

– zone selectivity enabled and no Vaux; 

– contact wear exceeds 80%. 

Events indicated by “EMERGENCY” LED: 

– overload (I>105% I ), function L under timing; 

1 

– function S under timing; 

– function G under timing; 

– second temperature threshold exceeded (85 °C); 

– contact wear 100%. 

7 

9 10 11 

A further four LEDs (9, 10, 11) signal the following: 

–“μP Fault”: indicates that the protection unit microprocessor 

has a temporary (lit for a limited time) or permanent (lit for an 

unlimited time) fault 

– “Vaux”: indicates there is an auxiliary power supply 

– “Communication NETWORK”: indicates the communication 

activity between the dialogue unit and the remote supervision 

unit 

– “Communication μP Fault”: indicates that the communication 

unit microprocessor has a temporary (lit for a limited 

time) or permanent (lit for an unlimited time) fault 

Electrical signalling contacts 

Three clean contacts provided on all versions of the SACE 

PR112 release enable electrical signalling of the following: 

– (5 A / 240 V ac) overload alarm (I >90%); 

1 

– (0.5 A / 125 V ac) relay tripped (closes following tripping of 

any of the protection functions - L, S, I, G and excessive 

temperature rise); 

– microprocessor fault (can be used to directly close the circuit 

which powers the circuit-breaker shunt opening release). 

Note: 

The overload and microprocessor fault contacts to the microcontroller are 

available with an external auxiliary power supply. 

65



Resetting trip signals 

The “RESET” pushbutton (detail 7 on page 65) allows local 

resetting of the protection trip signals (relay tripped contact 

and magnetic flags). 

In the case of remote control, the resetting signal for the protection 

trip signals can be transmitted by means of a dialogue 

unit (PR112/PD version) only for relay trip caused by excessive 

temperature and by overload (L). Resetting the trip signals 

for the other functions (S, I and G) can only be carried out 

locally. When the signal is not reset, actuation of the circuitbreaker 

closing command by the dialogue unit is prevented. 

Load control 

According to the relative trip threshold setting for overload (I1), 

the SACE PR112 unit allows two trip thresholds to be defined 

(fraction of I1) which, by using the SACE PR010/K signalling 

unit, can enable two clean contacts with electrical characteristics 

which allow one shunt closing or opening release of the 

circuit-breaker to be piloted for any power supply voltage value. 

These contacts make various applications possible, among 

which load control, alarms, signals and electrical interlocks. 

Within the sphere of load control, there are two possible configurations 

which can be selected by the user during the SACE 

PR112 parametrisation stage: 

– disconnection of two loads 

– connection and disconnection of a load 

Measuring function 

The current measuring function (ammeter) is present on all 

versions of the SACE PR112 unit. 

The display shows the currents of the three phases, of the neutral 

and of the earth fault. 

The latter current value takes on two different meanings depending 

on whether the external toroidal transformer for the 

“Source Ground Return” function or the internal transformer 

(residual type) is connected. 

The ammeter can operate either with self-supply or with auxiliary 

power supply voltage. 

Accuracy of the ammeter measuring chain (current transformer 

66 


plus ammeter) in the 30% - 120% current range of In comes 

under class 5. 

Versions available 

• PR112/P (LSI) 

• PR112/P (LSIG) 

• PR112/PD (LSI) 

• PR112/PD (LSIG) 

SACE PR110/B power supply accessory 

This accessory – always supplied with the range of SACE 

PR112 releases – makes it possible to read and configure the 

parameters of the unit whatever the state of the circuit-breaker 

(open-closed, in the test or connected position, with/without 

auxiliary power supply). 

Inside it there is an electronic circuit which allows power supply 

to the unit for about 3 h continuously to carry out just the 

readout and data configuration operations. 

Autonomy decreases proportionally to use if the PR110/B accessory 

is also used to carry out the “COMMAND” menu functions 

(Trip test, Auto test, CB closing (*), CB opening (*)). 

(*) only with SACE PR112/PD version


SACE PR010/K signalling unit 

The SACE PR010/K signalling unit is able to convert the digital 

signals supplied by the SACE PR112 unit (both in the P and 

PD version, with LSI or LSIG protection functions) into electrical 

signals by means of normally open electrical contacts. 

An auxiliary power supply with a voltage stabilised at 24V d.c. 

(±20% with maximum ripple ±5%) and insulated from earth is 

required to operate the unit. 

It is connected to the Internal Bus of the protection unit by 

means of a dedicated serial line accessible to the user, along 

which all the information regarding the state of activation of 

the protection functions is transmitted on the basis of which 

the relative power contacts are closed. 

The following are available in particular: 

– contact for signalling overload alarm (circulating current 

higher than 130% of I1) 

– contact for signalling protection L tripped 

– contact for signalling protection S tripped 

– contact for signalling protection I tripped 

– contact for signalling protection G tripped 

– contact for signalling second threshold for temperature too 

high exceeded (T>85°C) 

– load control. 

In particular, the contact for signalling that the second threshold 

for temperature too high has been exceeded can be 

configured by means of a dip switch on the unit, allowing signalling 

no connection with the Internal Bus as an alternative. 

Two contacts available on the SACE PR010/K unit (load control) 

allow a circuit-breaker shunt opening or closing release to 

be piloted whatever the power supply voltage of the release. 

These contacts make various applications possible, among 

which load control, alarms, signals and electrical interlocks. 

The alarm signal remains active for the whole duration of the 

overload until eventual trip of the release. 

The signals for protection trips remain active during the timing 

phase and stay like this even after the release trip. 

A Reset pushbutton allows the state of all the signals to be 

reset. 

There are also two LEDs available on the unit for visual signalling 

of the following information: 

– “power ON”: auxiliary power supply present 

– “TX (Int BUS)”: flashing synchronised with communication 

activity with the Internal Bus 

The table below shows the characteristics of the signalling 

relays available on the SACE PR010/K unit. 

Characteristics of the signalling relays 

Auxiliary power supply 24 V c.c. ± 20% 

Maximum ripple 5% 

Maximum interrupted current 5 A 

Maximum interrupted voltage 250 V c.a. / 130 V c.c. 

Resistive load breaking - 

capacity 50 W / 800 VA (48 V c.c. / 220 V c.a.) 

Inductive load breaking 

capacity 25 W / 500 VA (48 V c.c./ 220 V c.a.) 

Contact/contact insulation 1000 V eff 

Contact/coil insulation 2000 V eff 

67

SACE PR010/T 

Test and Configuration Unit 

The SACE PR010/T unit is an instrument able to carry out the 

Test, programming and parameter readout functions for the 

protection units which are fitted with SACE Emax low voltage 

air circuit-breakers. 

In particular, the Test function regards the following units: 

– SACE PR112 (in all versions) 

– SACE PR111 (in all versions) 

whereas the programming and parameter readout functions 

regard the SACE PR112 range of releases. 

All the functions mentioned can be carried out ON BOARD by 

connecting the SACE PR010/T unit to the front multi-pin connector 

on the various protection units. Connection is ensured 

by special interfacing cables supplied as standard with the 

unit. 

The man-machine interface is ensured by the use of a membrane 

keyboard and a multi-line alphanumerical display. 

There are also two LEDs on the unit which signal the following 

respectively: 

– POWER-ON and STAND BY situation 

– state of battery charge 

Two different types of Test are provided: automatic (only for 

SACE PR112) and manual. 

By means of connection to a PC (with diskette supplied by 

ABB SACE L.V.), it is also possible to up-grade the SACE PR010/ 

T unit software to adapt the Test unit as new products evolve. 

It is also possible to memorise the most important results of 

the test in the unit itself and to send them to the Personal Computer 

on a specific request for “issue of report”. 

In automatic mode (operation allowed with the SACE PR112 

range), the SACE PR010/T unit can test the following: 

– L, S, I protection functions; 

– G protection function with internal transformer; 

– G protection function with the toroid placed on the star centre 

of the transformer; 

– monitoring of correct microprocessor operation; 

– load control function for L function. 

The same tests can be repeated manually for both the SACE 

PR111 and SACE PR112 ranges of releases. 

68 


The SACE PR010/T unit is portable, operates with rechargeable 

batteries and/or with an external feeder (always provided) 

with 100-240 Vac / 12 Vdc rated voltage 

The SACE PR010/T unit includes the following in the standard 

supply: 

– SACE PR010/T Test unit complete with rechargeable batteries 

– SACE TT1 Test unit 

– external 100 - 240 Vac/12 Vdc feeder 

– connection cables between the unit and the multi-pin connector 

on the range of releases which equip the SACE Emax 

series 

– connection cable between the unit and the PC (RS232 serial) 

– power supply cable 

– instruction manual and diskette with application software 

– plastic container.

CONTENTS 

Accessories 

Circuit-breaker and fixed part accessories 70 

Spare parts and retrofitting 84 

69

Circuit-breaker and fixed part accessories 

The table below shows some functions which can be obtained 

by making a suitable selection of the accessories provided. 

Several of the functions listed may be needed at the same 

Remote control • Shunt opening release 

70 

Function 

time depending on the use made of the circuit-breaker. 

See the related section for a detailed description of the individual 

accessories. 

• Shunt closing release 

• Geared motor for automatic charging of closing springs 

Remote signalling or actuation of automatic functions • Auxiliary contacts of circuit-breaker open / closed 

depending on the state (open / closed) or isolated, 

or on the position (connected / isolated) of the circuit-breaker • Auxiliary contacts of circuit-breaker connected, isolated 

for test (for withdrawable circuit-breakers only) 

• Contact for electrical signalling of overcurrent releases 

tripped 

• Contact for signalling undervoltage de-energised 

• Contact for signalling springs charged 

Remote opening for various needs, including: • Shunt opening or undervoltage release 

– manual emergency operation 

– opening interlocked with operation of other switchgear or 

with plant automation requirements. 

Examples 

– circuit-breakers on L.V. side of transformers in parallel 

that must open automatically when the M.V. side device 

opens 

– automatic opening controlled by external relay 

(undervoltage, residual-current, etc.) 

Automatic opening of circuit-breaker due to undervoltage • Instantaneous or time delay voltage release 

(as in the case, for example, of operation of asynchronous N.B. The time-delay device is recommended when 

motors) unwarranted operation due to temporary voltage drops, 

is to be avoided (for functional or safety reasons). 

• Contact for signalling undervoltage energised 

Increase in degree of protection • IP54 protective cover for door 

Components 

Mechanical safety locks for maintenance or functional • Key lock in open position 

requirements for interlocking two or more circuit-breakers 

• Padlock device in open position 

• Key lock and padlock device in connected, isolated for test, 

isolated position 

Automatic switching of power supplies • Mechanical interlock between two or three circuit-breakers


Accessories supplied as standard 

The following standard accessories are supplied depending on the circuit-breaker version: 

Fixed circuit-breakers: 

– flange for switchboard compartment door (IP30) 

– support for service releases 

– four auxiliary contacts for electrical signalling of circuitbreaker 

open/closed (for circuit-breakers only) 

– terminal box for connecting outgoing auxiliaries 

– horizontal rear terminals 

– lifting plate 


Withdrawable circuit-breakers: 

– flange for switchboard compartment door 

– support for service releases 

– four auxiliary contacts for electrical signalling of circuitbreaker 

open/closed (for circuit-breakers only) 

– sliding contacts for connecting outgoing auxiliaries 

– horizontal rear terminals 

– anti-insertion lock for circuit-breakers with different rated 

currents 

– racking-out crank handle 

– lifting plate 

71


CAPTION: 

72 

= Accessory on request 

on fixed or on moving 

part 

= accessory on request 

for fixed part 

= accessory on request 

for moving part 

(*) For automatic circuit-breakers 

four auxiliary contacts for electrical 

signalling of circuitbreaker 

open/closed is included 

in the supply as standard. 


E1 … E6 

Accessories Circuit-breaker 

Circuit-breaker version Fixed Withdrawable 

1a) Shunt opening/closing release (YO/YC) 

1b) SOR Test Unit 

Compatibility table for accessories and different versions 

2a) Undervoltage rerlease (YU) 

2b) Time-delay device for undervoltage release (D) 

3) Geared motor for automatic charging of closing 

springs (M) 

4a) Mechanical signalling of overcurrent 

releases tripped 

4b) Electrical and mechanical signalling 

of overcurrent releases tripped 

5a) Electrical signalling of circuit-breaker open/closed ( * ) 

5b) Electrical signalling of circuit-breaker connected/ 

isolated for test/isolated 

5c) Contact signalling closing springs charged 

5d) Contact signalling undervoltage 

release energised (C.aux YU) 

6a) Current transformer for neutral conductor 

outside circuit-breaker 

6b) Homopolar toroid for main power supply 

earthing conductor 

7) Mechanical operation counter 

8a) Lock in open position 

8b) Circuit-breaker lock in connected/isolated/ 

isolated for test position 

8c) Accessories for lock in isolated/ 

isolated for test position 

8d) Accessories for shutter padlock device 

8e) Mechanical lock for compartment door 

9a) Protection for opening and closing pushbuttons 

9b) IP54 door protection 

10) Circuit-breaker interlock


E1 … E6 E1 … E6 E1 … E6 E1 … E6 

Switch-disconnector Isolating truck Earthing switch with Earthing truck 

(MS) (CS) making capacity (MTP) (MT) 


Fixed Withdrawable Withdrawable Withdrawable Withdrawable 


(YC) 


73



Electrical accessories 

1a) Shunt opening/closing release (YO/YC) 

Allows remote control opening or closing of the switchgear 

depending on the installation position and connection of the 

releases in the support. The release can be used for either of 

these uses. Given the characteristics of the circuit-breaker 

operating mechanism, opening (with the circuit-breaker closed) 

is always possible, while closing is only possible when the 

closing springs are charged. The release can operate with direct 

current or alternating current. 

This release provides instantaneous operation (*), but can be 

powered permanently (**). 

When used as a permanently powered closing release, it is 

necessary to momentarily de-energise the closing release in 

order to close the circuit-breaker again after opening (in fact, 

the circuit-breaker operating mechanism has an anti-pumping 

device). 

(*) The minimum impulse current duration time in instantaneous 

service must be 100 ms. 

(**) If the opening release is permanently connected to the power 

supply, wait at least 30 ms before sending the command to the 

shunt closing release. 

74 


Power supply (Un): 24 V – 

30 V ∼ 

48 V ∼ 

60 V ∼ 

110-120 V ∼ 

120-127 V ∼ 

220-240 V ∼ 

240-250 V ∼ 

380-400 V ∼ 

440-480 V ∼ 

Operating limits: (YO): 70 … 110 Un 

(CEI EN 60947-2 Standards) 

(YC): 85 … 110 Un 

Inrush power (Ps): DC = 200 W 

Inrush time ~100 ms AC = 200 VA 

Continuous power (Pc): DC = 5 W 

AC = 5 VA 

Opening time (YO): (max) 60 ms 

Closing time (YC): (max) 80 ms 

Insulation voltage: 2500 V 50 Hz (for 1 min) 

Reference figure in circuit diagrams: 

YO (4-5) - YC (2-3) 

1b) SOR Test Unit 

The control/monitoring SOR Test Unit allows continuity of the 

different versions of SACE Emax series of shunt opening releases 

to be checked. 

Under particularly severe operating conditions or simply for 

remote control of the circuit-breaker, the shunt opening release 

as an accessory for the SACE Emax series of air circuit-breakers 

is widely used.

Maintenance of all functions of this accessory is a necessary 

condition to guarantee a high level of safety in the installation. 

This bring about the need to have a device available which 

cyclically checks correct operation of the release, signalling 

any malfunctions. 

The SACE SOR Test Unit allows continuity of the shunt opening 

release with a rated operating voltage between 24 V and 

250 V (a.c. and d.c.) to be checked. 

Checking of continuity is carried out cyclically with an interval 

of 20s between one test and the next. 

The unit has visual signals by means of LEDs. The following 

information in particular is indicated: 

• POWER ON: power supply present 

• YO TESTING: version of the test 

• TEST FAILED: signal following a failed test or lack of auxiliary 

power supply 

• ALARM: signal following three failed tests. 

Two relays with one change-over are also available on board 

the unit which allow remote signalling of the following two 

events: 

• failure of a test - resetting takes place automatically when 

the alarm stops 

• failure of three tests - resetting only takes place by means of 

the manual RESET from the front of the unit. 

There is also a button for manual RESET on the front of the 

unit. 

The main characteristics of the SACE SOR Test Unit are indicated 

below. 

Auxiliary power supply 24 V ... 250 V ~ 

Maximum interrupted current 6 A 

Maximum interrupted voltage 250V AC 


2a) Undervoltage release (YU) 

The undervoltage release opens the circuit-breaker in the event 

of a significant drop in the power supply voltage or a power 

supply failure. It can be used for remote release (using normally-closed 

pushbuttons), for a lock on closing or for monitoring 

the voltage in the primary and secondary circuits. The 

power supply for the release is therefore branched on the 

supply side of the circuit-breaker or from an independent 

source. The circuit-breaker can only be closed with the release 

powered (the closing lock is obtained mechanically). 

The release can operate both with direct current and alternating 

current. 

Power supply (Un): 

24 V – 120-127 V ~ 

30 V ~ 220-240 V ~ 

48 V ~ 240-250 V ~ 

60 V ~ 380-400 V ~ 

110-120 V ~ 440-480 V ~ 

Operating limits: (CEI EN 60947-2 Standards) 

The circuit-breaker is opened with release power supply 

voltages equal to 35-70% Un. 

The circuit-breaker can be closed with a release power supply 

voltage equal to 85-110% Un. 


AC = 200 VA 

Continuous power (Pc) DC = 5 W 

AC = 5 VA 

Opening time (YU): 30 ms 


It can be fitted with a contact for signalling the undervoltage 

release is energised (C.aux YU) (see accessory 5d) 

Reference figure in circuit diagrams: YU (6) 

75



2b) Time-delay device for undervoltage release (D) 

The undervoltage release can be combined with an electronic 

time-delay device for installation outside the circuit-breaker, 

allowing delayed trip of the release with adjustable preset times. 

Use of the delayed undervoltage release is recommended to 

prevent tripping when the power supply network for the release 

may be subject to brief voltage drops or power supply 

failures. Closing of the circuit-breaker is inhibited when it is not 

powered. 

The time-delay device is designed to operate in conjunction 

with the undervoltage release with the same voltage as the 

time-delay device. 

The characteristics of the time-delay device are as follows: 

Power supply (D): 24-30 V 

48 V 

60 V 

110-115 V 

220-250 V 

Adjustable opening 

time (YU+D): 0.5-1-1.5-2-3 s 

Reference figure in circuit diagrams: YU+D (7) 

76 


3) Geared motor for automatic charging of closing 

springs (M) 

Allows automatic charging of the circuit-breaker operating 

mechanism closing springs. The geared motor charges the 

closing springs again immediately after the circuit-breaker has 

closed. 

The closing springs can, however, be charged manually (using 

the relative operating mechanism lever) in the event of a 

power supply failure or during maintenance work. 

Power supply 24-30 V 

48-60 V 

100-130 V 

220-250 V 

Operating limits: 85…110 Un 

(CEI EN 60947-2 Standards) 


AC = 500 VA 

Rated power (Pn): DC = 200 W 

AC = 200 VA 

Inrush time 0.2 s 

Loading time: 4-5 s 


It is always supplied with a limit contact and microswitch for 

signalling that the closing springs are charged (see accessory 

5d). 

Reference figure in circuit diagrams: M (1)



4) Mechanical and electrical signalling of 

undervoltage releases tripped 

The following signals are available after the overcurrent release 

has tripped: 

4a) Mechanical signalling of overcurrent releases 

tripped 

Where the circuit-breaker is open following operation of the 

overcurrent releases, this can be signalled visually on the operating 

mechanism, moving the release tripped pushbutton 

out. The circuit-breaker can only be closed again by resetting 

the pushbutton to its normal position. 

4b) Electrical and mechanical signalling of overcurrent 

releases tripped 

Allows visual signalling on the operating mechanism (mechanical) 

and remote signalling (electrical using change-over contact) 

that the circuit-breaker is open following operation of the 

overcurrent releases. The mechanical signalling pushbutton 

must be rearmed to reset the circuit-breaker. 

The SACE PR112 release is already supplied with an internal 

overcurrent signalling contact. 

Reference figure in circuit diagrams: S51 (12) 


5) Auxiliary contacts 

Auxiliary contacts, installed on the circuit-breaker are available, 

which enable the state of the circuit-breaker to be signalled. 

Un In max T 

125 Vcc 0.3 A 10 ms 

250 Vcc 0.15 A 

Un In max cos ϕ 

ϕ 

250 Vca 5 A 0.3 

The auxiliary contacts are also available in a special version 

for application with rated voltages Un < 24 V (digital signals). 

The versions available are as follows: 

5a) Electrical signalling of circuit-breaker open/closed 

It is possible to have electrical signalling of the state (open/ 

closed) of the circuit-breaker using 4, 10 or 15 auxiliary contacts. 

The auxiliary contacts have the following configurations: 

– 10 open/closed contacts (5 normally open + 5 normally 

closed); not available when the SACE PR112 overcurrent 

release is required. 

– 15 additional open/closed contacts for installation outside 

the circuit-breaker. The basic configuration described above 

may be modified by the user for normally open or normally 

closed indication by repositioning the faston connector on 

the microswitch. 

Reference figure in circuit diagrams: Q/1÷10 (21-22) 

77



5b) Electrical signalling of circuit-breaker 

connected / isolated for test / isolated 

In addition to mechanical signalling of the circuit-breaker position, 

it is also possible to obtain electrical signalling using 5 

or 10 auxiliary contacts which are installed on the fixed part. 

Only available for withdrawable circuit-breakers - for installation 

on the fixed part. 

The auxiliary contacts take on the following configurations: 

– 5 contacts; set comprising 2 contacts for signalling connected, 

2 contacts for signalling withdrawn and 1 contact 

for signalling test position (main pliers isolated, but sliding 

contacts inserted). 

– 10 contacts; set comprising 4 contacts for signalling connected, 

4 contacts for signalling withdrawn and 2 contacts 

for signalling test position (main pliers isolated, but sliding 

contacts inserted). 

Reference figure in diagrams: 

S75I (31-32) 

S75T (31-32) 

S75E (31-32) 

78 


5c) Contact for signalling closing springs loaded 

Comprises a microswitch which allows remote indication of 

the state of the circuit-breaker operating mechanism closing 

springs. (Supplied as standard with spring-charging geared 

motor). 

Reference figure in circuit diagrams S33 M/2 (11) 

5d) Contact signalling undervoltage release energised 

(C.aux YU) 

The undervoltage releases can be fitted with a contact (normally 

closed or open as preferred) for signalling undervoltage 

energised to provide remote signalling of the state of the undervoltage 

release. 

Reference figure in circuit diagrams: (12)



6a) Current transformer for the neutral conductor 

outside the circuit-breaker 

Only for three-pole circuit-breakers. Allows protection of the 

neutral by means of connection to the overcurrent release. (Can 

be supplied on request). 

Reference figure in circuit diagrams:TI/N-UI/N (51-52) 

6b) Homopolar toroid for the main power supply 

earthing conductor (star centre of the 

transformer) 

The range of SACE PR112 microprocessor-based electronic 

releases can be used combined with an external toroid located 

on the conductor which connects the start centre of the MV/LV 

transformer to earth (homopolar transformer). 

In this case, the protection to earth is defined as Source Ground 

Return. 

The homopolar transformer is proposed in four different versions 

in terms of rated current (but keeping the same overall 

dimensions in any case). 

Rated current 100 A, 250 A, 400 A, 800 A 

Reference figure in circuit diagrams: TI/O (51-52) 



Mechanical accessories 


Connected to the operating mechanism using a simple lever 

mechanism, it indicates the number of mechanical operations 

of the circuit-breaker. The indication is visible from outside on 

the front of the circuit-breaker. 

8) Mechanical locks 


Several different mechanisms are available which allow the 

circuit-breaker to be locked in the open position. 

These devices can be controlled by: 

– Key: a special circular lock with different keys (for a single 

circuit-breaker) or the same keys (for several circuit-breakers). 

In the latter case, up to four different key numbers are 

available. 

– Padlocks: up to 3 padlocks (not supplied): Ø 4 mm. 

79



isolated 

This device can be controlled by a special circular lock with 

different keys (for a single circuit-breaker) or the same keys 

(for several circuit-breakers - up to four different key numbers 

available) and padlocks (up to 3 padlocks, not supplied - Ø 4 

mm). 


on the moving part. 

Emax0415 8b) Circuit-breaker lock in connected / isolated for test / 

8c) Accessories for locking in isolated / isolated for test 

position 

In addition to the circuit-breaker lock in the connected / isolated 

for test position - isolated, allows the circuit-breaker to 

be locked only in the isolated or isolated for test positions. 


on the moving part. 

80 


8d) Accessory for shutter padlock device 

Allow the shutters (installed on the fixed part) to be padlocked 

in their closed position. 


on the fixed part. 


Stops the compartment door from being opened when the circuit-breaker 

is closed (and circuit-breaker connected for withdrawable 

circuit-breakers) and locks closing of the circuitbreaker 

when the compartment door is open.



9) Transparent protections 

9a) Opening and closing pushbutton protection 

These protections are fitted over the opening and closing 

pushbuttons, preventing the relative circuit-breaker operations 

unless a special tool is used. 

9b) IP54 door protection 

This is a transparent plastic protective cover which completely 

protects the front panel of the circuit-breaker, and allows degree 

of protection IP54 to be achieved. Mounted on hinges, it 

is fitted with a key lock. 


10) Interlock between circuit-breakers 

This mechanism creates a mechanical interlock between two 

or three circuit-breakers (even different models and different 

versions - fixed / withdrawable) using a flexible cable. The circuit 

diagram for electrical switching using a relay (for installation 

by the customer) is supplied with the mechanical interlock. 

The circuit-breakers can be installed vertically or horizontally. 

Four types of interlocks are available: 

type A: between 2 circuit-breakers (power supply + emergency 

power supply) 

type B: between 3 circuit-breakers (2 power supplies + emergency 

power supply) 

type C: between 3 circuit-breakers (2 power supplies + bustie) 

type D: between 3 circuit-breakers (3 power supplies / one single 

closed circuit-breaker) 

N.B.: See the chapter on “Installation of the circuit-breaker” for 

information on the dimensions (fixed and withdrawable versions) 

and preparation (pages 107, 112 and 113). 

81


Interlocks 

The mechanical interlocks possible are shown below linked to 

whether 2 or 3 circuit-breakers (any model in any version) are 

Between two circuit-breakers 

One normal power supply and 

one emergency power supply 

Type A 

Between three circuit-breakers 

Two normal power supplies and 

one emergency power supply 

Type B 


The two half-busbars can be powered 

by a single transformer (bus-tie closed) 

or by both at the same time (bus-tie 

open) 

Type C 


Three power supplies (generators or 

transformers) on the same busbar, so 

operation in parallel is not allowed 

Type D 

82 

1 2 

G 

1 2 3 

1 2 3 

1 2 3 

used in the switching system (also see chapter on “Accessories”). 

Type of interlock Typical circuit Interlocks possible 

G 

O = Circuit-breaker open 

I = Circuit-breaker closed 





G 



Circuit-breaker 1 can only 

be closed if 2 is open and 

vice versa 

Circuit-breakers 1 and 3 

can only be closed if 2 is 

open. 

Circuit-breaker 2 can only 

be closed when 1 and 3 

are open. 

One or two circuit-breakers 

out of three can be 

closed at the same time. 

Only one of three circuitbreakers 

can be closed. 

1 2 

O O 

I O 

O I 

1 2 3 

O O O 

I O O 

O O I 

I O I 

O I O 

1 2 3 

O O O 

I O O 

O I O 

O O I 

O I I 

I I O 

I O I 

1 2 3 

O O O 

I O O 

O I O 

O O I

ASEM0057 

The emergency power supply is usually 

installed to take over from the normal 

power supply in two cases: 

– to power health and safety services 

(e.g. hospital installations); 

– to power parts of installations which 

are essential for requirements other 

than safety (e.g. continuous cycle industrial 

plants). 

The range of accessories for SACE Emax 

circuit-breakers includes solutions for a 

wide variety of different plant engineering 

requirements. 

Where devices for protection against 

overcurrents and direct and indirect contacts 

and the provisions aiming to improve 

reliability and safety of emergency 

circuits are concerned, see the relative 

standards. 

Switching from the normal to the emergency 

power supply can be carried out 

manually (locally or by remote control) 

or automatically. 

To this end, the circuit-breakers used for 

switching must be fitted with the accessories 

required to allow electric remote 

control and provide the electrical and 

mechanical interlocks required by the 

switching logic. 

These include: 

– the shunt opening release 

– the shunt closing release 

– the motor operator 

– the auxiliary contacts. 

The switching function can be automated 

using a suitable electronicallycontrolled 

relay circuit, to be installed by 

the customer (circuit diagram supplied 

by ABB SACE L.V.). 

The mechanical interlocks between two 

or three circuit-breakers are created using 

cables which are suitable both for 

horizontally and vertically installed circuit-breakers. 

83

Spare parts and retrofitting 

Spare parts 

– Front metal shields and escutcheon plate 

– Opening solenoid for SACE PR111 - PR112 overcurrent release 

– Arcing chamber 

– Closing springs 

– Plier isolating contact for fixed part of withdrawable circuitbreaker 

– Sliding earthing contact (for withdrawable version) 

– Shutters for fixed part 

– Complete pole 

– Control device 

– Cables for connecting releases and current transformers to 

each other 

– Transparent protection for releases 

– SACE PR110/B power supply unit. 

84 


Retrofitting kits 

Special kits, including SACE Emax circuit-breakers, are available 

for replacing old SACE Otomax and SACE Novomax G30 

circuit-breakers, using all the components of existing switchboards. 

Fitting the new in the old has unquestionable technical 

and economic benefits, is very quick to perform and uses 

the existing main switchboard connections.

CONTENTS 

Applications of the circuit-breaker 

Primary and secondary distribution 86 

Selectivity tables 90 

Earth fault protection 91 

Switching and protection of transformers 96 

Protection of lines 97 

Switching and protection of generators 98 

Switching and protection of asynchronous motors 100 

Switching and protection of capacitors 102 

85

Primary and secondary distribution 

Back-up protection 

Back-up protection is provided for by Standards CEI 64-8 and 

IEC 364-4-437, which allow the use of a protection device with 

a breaking capacity lower than the prospective short-circuit 

current in the point where it is installed, on condition that there 

is another protection device with the necessary breaking capacity 

on the supply side. In this case the characteristics of 

the two devices must be coordinated in such a way that the 

specific energy (I 2 t) which the device on the supply side lets 

through is not higher than that which can be withstood without 

damage by the device on the load side and by the protected 

conductors. 

In the diagram in the figure, circuit-breaker B, located on the 

load side of circuit-breaker A, can have a lower breaking capacity 

than the prospective short-circuit current in the event of 

a fault in “C”, if circuit-breaker A is able to satisfy both the 

following conditions: 

ASEM0038 

– it has a suitable breaking capacity (greater than or equal to 

the prospective short-circuit current in its point of installation 

and obviously greater than the short-circuit current in “C”) 

– in the event of a fault in “C” with short-circuit values higher 

than the breaking capacity of circuit-breaker B, circuitbreaker 

A must provide a specific let-through energy limiting 

function, limiting it to a value that can be withstood by circuitbreaker 

B and the protected conductors. 

A fault in “C” can therefore cause a double interruption, however 

the back-up protection must ensure that B always trips 

within the limits of its breaking capacity. 

It is necessary to choose switchgear combinations which have 

been verified in laboratory tests for this type of protection. The 

combinations possible are specified in ABB SACE L.V. documents 

(Slide rules, DOC) and shown here for the SACE Emax 

circuit-breakers. 

86 

Back-up protection is used in electrical installations where 

continuous operation is not an essential requirement, since 

the opening of the circuit-breaker on the supply side also cuts 

out users which are not affected by the fault. However, the 

adoption of this type of coordination allows one to limit the size 

of the installation and therefore reduce costs. 

Note 

Back-up protection can also be implemented on more than two levels. The 

figure below shows an example of coordination on three levels. In this 

case the choices are correct if at least one of the two situations below is 

verified: 

– the circuit-breaker furthest on the supply side A is coordinated both 

with circuit-breakers B and C (coordination between circuit-breakers B 

and C is not necessary); 

– each circuit-breaker is coordinated with the circuit-breaker immediately 

on the load side of it, which is to say the circuit-breaker furthest on the 

supply side A is coordinated with the next one B, which is in turn coordinated 

with circuit-breaker C. 

ASEM0039 

Table showing coordination for back-up protection 

C.-breaker on the supply side Breaking capacity 

E2L - E3L 130 [kA] (a 380/415 V) 

Circuit-breaker Breaking capacity on 

on the load side outgoing lines with back-up 

S5N 65 [kA 

S5H - S6N - E1B - E2B 85 [kA] 

S6S - S6H - S7S - S7H - E2N 100 [kA]

Example 

The installation section considered has the characteristics 

shown in the figure. 

Chain of circuitbreakers 

in installations 

with series 

(back-up) protection 

ASEM0040 

Example of use of limitation 

curves 

ASEM0041 

A 

B 

Ib = 1300 A 

400 V 

Icc = 100 kA 

Ib = 350 A 

Load 

Electrical characteristics of the circuit-breaker 

In the most frequent case, where the short-circuit occurs close 

to the user (U), normally located at a certain distance from the 

main switchboard, the level of the fault current may be less 

than 30 kA. Selective operation of the chain selected must be 

ensured for values of less than 30 kA. 

Conversely, the fault current values will be higher when the 

short- circuit occurs on the busbars or close to the user circuitbreaker. 

Fast tripping of the SACE Emax E2L16 circuit-breaker 

puts the distribution switchboard out of service, protecting both 

the installation and the switchgear installed in it, but in this 

case the continued service of those users not affected by the 

fault is not ensured. 

According to the current limitation curves, the SACE Emax 

E2L16 circuit-breaker on its own reduces the peak current value 

to 120 kA for a prospective peak current of 220 kA with the 

fault level considered (100 kA). The peak value of the current 

effectively limited is 120 kA, corresponding to a limited effective 

current of only 55 kA. This value allows a SACE Isomax S5H 

400 circuit-breaker with PR211 release to be used as the circuitbreaker 

on the load side. 

Reference Operating Type Rated uninterrupted Breaking Selectivity 

current current capacities limit 

[A] Iu [A] Icu [kA] [kA] 

A 1300 SACE Emax E2L16 1600 130 30 

B 400 SACE Isomax S5H 400 400 65 30 

prospective Icc 

limited Icc 

87

Primary and secondary distribution 

Selective protection 

Selectivity is normally actuated for tripping overcurrent protection 

devices in civil and industrial installations to isolate the 

part affected by a fault from the system, causing only the circuit-breaker 

immediately on the supply side of the fault to trip. 

The example in the figure below highlights the need to coordinate 

the trip between the two circuit-breakers A and B so that 

only circuit-breaker B is tripped in the event of a fault in C, 

ensuring continuity of service for the rest of the system powered 

by circuit-breaker A. 

Whereas natural selectivity within the overload current range 

is normally found due to the difference between the rated currents 

of the user protection circuit-breaker and the main circuit-breaker 

on the supply side, selectivity can be obtained in 

the short-circuit current range by differentiating the current 

values and, if necessary, the trip times. 

Selectivity can be total or partial: 

– total selectivity: only circuit-breaker B opens for all the current 

values lower than or equal to the maximum short-circuit 

current in C; 

– partial selectivity: only circuit-breaker B opens for fault currents 

below a given value, while circuit-breakers A and B 

trip for equal or higher values. 

Circuit diagram with 

selective 

coordination of the 

protection devices. 

ASEM0043 

In principle, the following types of selectivity are possible: 

Current-type selectivity, obtained by setting the instantaneous 

trip currents of the circuit-breaker chain to different values 

(higher settings for the circuit-breakers on the supply side). 

Mainly used in terminal distribution installations where the circuit-breakers 

feature instantaneous trip protection. The result 

is often partial selectivity. 

Time-type selectivity, obtained by intentionally incorporating 

increasing time-delays in the trip times of the circuit-breakers 

88 

ASEM0042 

furthest on the supply side in the chain. The relationship between 

the trip thresholds on the supply side and on the load 

side must be greater than 1.5 in the same way as for currenttype 

selectivity. In this case one must make sure that the circuit-breakers 

with delayed trip have an Icw current value that 

is suitable for the most severe situation that can be envisaged 

in the point of installation (maximum current envisaged - timedelay 

set). Time-type selectively requires a time-delay of at 

least 100 ms to be set in relation to the trip time of the circuitbreaker 

on the load side. 

All versions of the SACE PR111 and PR112 microprocessorbased 

releases have protection function S and are therefore 

suitable for time-type selectively (see chapter on overcurrent 

releases). 

ASEM0044

Example of time-type selectivity 

Switchboar 

Switchboard Switchboar 

Switchboard 

d A 

A 

Switch- SwitchSwitch- boar board boar d B 

B 

ASEM0045 

S6H 630 

with PR112 

E2N20 

with PR111 

2500 kV 

1500 (fault kVA current 57.5 kA) 

10 / 0,38 kV 

E4 S40 

with PR112 

E2N20 MS (isolator) 

Zone selectivity, applicable to protection functions S and G. 

This type of selectivity allows shorter trip times for the circuitbreaker 

closest to the fault to be obtained than in the case of 

time-type selectivity. 

The word zone is used to refer to the part of an installation 

between two circuit-breakers in series. Each circuit-breaker 

which detects a fault communicates this to the circuit-breaker 

on the supplyside using a simple connection wire. The fault 

zone is the zone immediately on the load side of the circuitbreaker 

which detects the fault but does not receive any communication 

from those on the load side. This circuit-breaker 

opens without waiting for the time-delay set. 

All SACE Emax circuit-breakers in versions B-N-S-H-V with a 

SACE PR112 release allow zone selectivity to be made. 

Note 

For selectivity in the event of earth faults with circuit-breakers in series see 

page 91. 

ABB SACE L.V. provides important calculation tools to facilitate 

the work of designers in co-ordinating protection devices including 

the Slide rule kits, DOC and C.A.T. software packages. 

10 3 

10 2 

10 

1 

10 -1 

10 -2 

8 

6 

4 

2 

8 

6 

4 

2 

8 

6 

4 

2 

8 

6 

4 

2 

8 

6 

4 

2 

T (s) 

I (A) 

2 4 6 8 

102 103 104 105 2 4 6 8 2 4 6 8 

ASEM0047 

Zone 3 Zone 2 Zone 1 

3 

2 

1 

The co-ordination tables below are for the part regarding L 

(current-limiting) versions of SACE Emax circuit-breakers. 

89 

ASEM0046

Selectivity tables 

Circuit-breaker 

on the supply 

side 

Notes: 

– T = total selectivity 

– The selectivity is expressed in kA at the power supply voltage of 380- 

415 V a.c. in conformity with the CEI EN 60947-2 Standards. 

– The values shown in the table are in relation to either the maximum 

short-circuit current for which selectivity is ensured or the maximum 

breaking capacity of the circuit-breaker on the load side. 

– SACE PR111-112 and SACE PR211-212 releases offer many different 

possible time-current settings for functions LSI. 

90 

Selectivity tables for SACE Emax current-limiting circuit-breakers with SACE Isomax circuit-breakers 

Circuit-breaker E2L 12 - E2L 16 E3L 20 - E3L 25 

on the load side 

In [A] 250 400 800 1250 1600 1250 1600 2000 2500 

In [A] Im [A] 3000 4800 10000 10000 10000 15000 15000 15000 15000 

10 500 16/18 T T T T T T T T 

12.5 500 16/18 T T T T T T T T 

16 500 16/18 T T T T T T T T 

20 500 16/18 T T T T T T T T 

S1B 25 500 16/18 T T T T T T T T 

S1N 32 500 16/18 T T T T T T T T 

S2B 40 500 16/18 T T T T T T T T 

S2N 50 500 16/18 T T T T T T T T 

S2S 63 630 16/18 T T T T T T T T 

S3N 

S3H 

S3L 

S4N-H-L 

PR211 

80 800 16/18 T T T T T T T T 

100 1000 16/18 T T T T T T T T 

125 1250 16/18 T T T T T T T T 

160 1600 16/18 T T T T T T T T 

32 500 8.5 14 35/61 35/61 35/61 35/61 35/61 35/61 35/61 

50 500 8.5 14 35/61 35/61 35/61 35/61 35/61 35/61 35/61 

80 800 8.5 14 35/61 35/61 35/61 35/61 35/61 35/61 35/61 

100 1000 8.5 14 35/61 35/61 35/61 35/61 35/61 35/61 35/61 

125 1250 8.5 14 35/61 35/61 35/61 35/61 35/61 35/61 35/61 

160 1600 8.5 14 35/61 35/61 35/61 35/61 35/61 35/61 35/61 

200 2000 14 35/61 35/61 35/61 35/61 35/61 35/61 35/61 

250 2500 35/61 35/61 35/61 35/61 35/61 35/61 35/61 

100 1200 8.5 14.5 35/55 35/55 35/55 35/55 35/55 35/55 35/55 

160 1920 8.5 14.5 35/55 35/55 35/55 35/55 35/55 35/55 35/55 

250 3000 35/55 35/55 35/55 35/55 35/55 35/55 35/55 

S5N-H-L 320 3840 30 30 30 30 30 30 30 

PR211 400 4800 30 30 30 30 30 30 30 

S6N-S-H-L 630 7560 

PR211 800 9600 

S7S-H-L 

PR211 

1000 12000 

1250 15000 

1600 19200 

S4N-H-L 

PR212 

100 

160 

250 

1200 

1920 

3000 

8.5 

8.5 

14.5 

14.5 

35/65/78 

35/65/78 

35/65/78 

T 

T 

T 

T 

T 

T 

T 

T 

T 

T 

T 

T 

T 

T 

T 

T 

T 

T 

S5N-H-L 320 3840 35/39 T T T T T T 

PR212 400 4800 35/39 T T T T T T 

S6N-S-H-L 630 7560 35/55 T T T T T 

PR212 800 9600 T T T T T 

S7S-H-L 

PR212 

1000 12000 34 35/42 

1250 15000 35/42 

1600 19200 

The table below takes the following settings into consideration 

Releases 

TM I1 = 1 x Ith I3 = 10 x Ith 

PR211 I1 = 1 x In I3 = 12 x Ith 

PR212 I1 = 1 x In I2 = OFF I3 = 12 x Ith t1 = curve D 

PR111 I1 = 1 x In I2 = 10 x In I3 = 12 x Ith t2 = curve D 

PR112 I1 = 1 x In I2 = 10 x In I3 = 12 x Ith t2 = 72 s

Earth fault protection 

Circuit-breakers with protection function 

“G” 

Circuit-breakers fitted with releases offering earth fault protection 

function “G” are usually used in MV/LV distribution substations 

both to protect the transformers and distribution lines. 

The protection function “G” detects the residual current of the 

sum of the currents detected by the current transformers on 

the phases and on neutral. Its use is effective in TT, IT, and TN- 

S electrical installations and, limited to the section of the installation 

having its neutral conductor (N) branched and separated 

from conductor PE, also in TN-CS systems. Protection 

function “G” is not used in TN-C systems since they provide 

the neutral and protection functions using a single conductor. 

The protection device thresholds and trip times can be selected 

from a wide range, also making it easy to obtain selectivity 

for this type of fault with regard to the protection devices 

TT 

TN-C 

TN-S 

IT 

Z 

massa 

massa 

massa 

massa 

L1 

L2 

L3 

N 

P 

L1 

L2 

L3 

PEN 

L1 

L2 

L3 

N 

PEN 

L1 

L2 

L3 

PE 

installed on the load side. Selectivity is therefore ensured regarding 

the residual-current releases located on the load side. 

Function “G” of the SACE PR111 has constant specific letthrough 

energy curves (I 2 t = k). On the SACE PR112, curves 

with trip times that are independent of the current (t = k) can 

also be selected. 

The figure below shows an example of one possible choice of 

earth fault protection devices and their possible settings. 

The protection function “G” of the circuit-breakers on the main 

switchboard A has the task of enabling them to trip selectively 

with respect to each other and the residual-current protection 

devices located on the users of the distribution switchboards B. 

Example of choice of earth fault protection devices and their 

relative settings. 

ASEM0052 

Switchboard A 

Switchboard B 

1500 kVA 

10 / 0,38 kV 

E3N25 with PR112 

I4 = 0.2 x Ith = 500 A 

t4 = 0.8 s 

E2N12 with PR111 

I4 = 0.3 x Ith = 375 A 

t4 = 0.4 s 

91

Earth fault protections 

Use of the toroid on the star centre of the 

transformer 

In the case of circuit-breakers for protection of MV/LV transformers, 

the possibility of installing a toroid on the conductor 

connecting the star centre of the transformer to earth is provided 

(application allowed with the SACE Emax series fitted 

with the range of SACE PR112 electronic releases); this way 

the earth fault current is determined. 

The following figure shows the operating principle of the toroid 

installed on the star centre of the transformer. 

GSEM0053 

The use of this accessory allows the protection threshold 

against earth fault (function G) to be independent of the size of 

the primary current transformers installed on the circuit-breaker 

phases. 

The table below shows the main characteristics of the range 

of toroids (only available in the closed version). 

Rated current 100A, 250A, 400A, 800A 

External dimensions of the toroid 

Internal diameter of the toroid Ø = 112 mm 

92 

H 

W 

D 

W = 165 mm 

D = 160 mm 

H = 35 mm 

PSEM9031 

Use of the SACE RCQ switchboard 

electronic residual current relays 

The range of SACE Emax circuit-breakers with rated current 

up to 2000A can be combined – if fitted with a shunt opening 

release to the SACE RCQ switchboard residual current relay - 

with a separate toroidal transformer (to be installed externally 

on the line conductors) and allows earth leakage currents for 

values between 0.03 and 30A to be determined. 

Thanks to the wide range of settings, the SACE RCQ switchboard 

relay is suitable for applications where a residual current 

protection system co-ordinated with the various distribution 

levels from the main switchboard to the final user is to be 

constructed. 

It is particularly suitable where low sensitivity residual current 

protection is required, for example both in partial (current-type) 

or total (time-type) selective chains, and for high sensitivity 

applications to carry out protection of people against direct 

contact. 

When the auxiliary power supply voltage drops, the opening 

command intervenes after a minimum time of 100ms and after 

the time set above 100ms. 

The SACE RCQ relay is suitable for use in the presence of 

alternating only earth current (Type AC), for alternating and/or 

pulsating current with continuous components (Type A) and is 

suitable for making residual current selectivity. 

The SACE RCQ relay is of the type with indirect action and 

acts on the release mechanism of the circuit-breaker by means 

of the circuit-breaker shunt opening release (to be ordered by 

the customer) to be housed in the circuit-breaker itself. 

The following table shows the main characteristics of the SACE 

RCQ relay.

SACE RCQ residual-current switchboard relay 

Power supply voltage d.c. [V] 80 ... 500 

a.c. [V] 48 ... 125 

Trip threshold setting IΔn 

- 1st range of settings [A] 0.03 - 0.05 - 0.1 - 0.3 - 0.5 

- 2nd range of settings [A] 1 - 3 - 5 - 10 - 30 

Trip time setting 1st range [s] 0 - 0.05 - 0.1 - 0.25 

Trip time setting 2nd range [s] 0.5 - 1 - 2.5 - 5 

Range of use of closed transformers 

- Toroidal transformer ∅ 60mm [A] 0.03 ... 30 


Range of use of transformers which can be opened 




Dimensions W x H x D [mm] 96 x 96 x 131.5 

Drilling for assembly on door [mm] 92 x 92 

H 

W 

D 

Dimensions of external toroid for SACE RCQ 

External dimensions of toroid Closed Openable 

W [mm] 94 165 166 241 297 

D [mm] 118 160 200 236 292 

H [mm] 81 40 81 81 81 

Internal diameter Ø [mm] 60 110 110 180 230 

93


of transformers 

Introduction 

When choosing circuit-breakers to protect the LV side of MV/ 

LV transformers, one basically needs to take the following into 

account: 

– the rated current of the transformer protected, L.V. side, which 

determines the circuit-breaker capacity and protection 

function setting required; 

– the maximum short-circuit current in the point of installation, 

which determines the minimum breaking capacity that must 

be offered by the protection device. 

MV-LV substation with a single transformer 

The rated current of the transformer, LV side, is determined by 

the following equation: 

Sn x 103 

In = 

3 x U20 in which 

Sn = rated power of the transformer, 

in kVA 

U = rated voltage of secondary 

20 

(no-load) of transformer, in 

V 

ln = rated current of the transformer, 

LV side, in A (rms 

value) 

94 

ASEM0055 

U 20 

Icc 

Sn 

In 

The three-phase short-circuit current at full voltage, immediately 

at the LV terminals of the transformer, can be expressed by the 

following equation (assuming infinite power at the primary): 

in which: 

In x 100 

Icn = 

Ucc% 

Ucc % = short-circuit voltage of the transformer in % 

ln = rated current, LV side, in A (rms value) 

lcn = rated three-phase short-circuit current, LV side, in 

A (rms value) 

The short-circuit current is lower than the values obtained using 

the equation above if the circuit-breaker is installed some 

distance away from the transformer using a cable or busbar 

connection, determined by the impedance of the connection. 

Choice of circuit-breaker 

The table below shows a number of possible choices of SACE 

Emax circuit-breakers in relation to the characteristics of the 

transformers to be protected. 

Caution! 

The information provided is valid for the conditions indicated in the 

table. The calculations will need to be adjusted for different conditions 

and the choices modified. 

Sn [kVA] 500 630 800 1000 1250 1600 2000 2500 3150 

Ucc (1) % 4 4 5 5 5 6,25 6,25 6,25 6,25 

In (2) [A] 722 909 1154 1443 1804 2309 2887 3608 4547 

Icn (2) [kA] 18 22.7 23.1 28.9 36.1 37 46.2 57.7 72.7 

SACE EmaxE1B08 E1B08 E1B12 E1B12 E2B16 E2B20 E3B25 E3B32 E4S40 E6H50 

I’cn = Icn Ucc% 

(1) For different percent short-circuit voltage values U’cc% than the Ucc% values shown in the table, the rated three-phase short-circuit current 

Icn becomes: 

U’cc% 

(2) The values calculated are for a U 20 voltage of 400 V. For different U’ 20 values, multiply In and Icn by the following k factors: 

U’ 20 [V] 220 380 400 415 440 480 500 660 690 

k 1.82 1.05 1 0.96 0.91 0.83 0.8 0.606 0.580

MV-LV substation with several 

transformers in parallel 

The rated current of the transformer is calculated following the 

same procedure outlined in the previous section. 

The minimum breaking capacity of every protection circuitbreaker 

on the LV side must be higher than whichever of the 

following values is greatest (the example is for machine 1 in 

the figure and applies to three machines in parallel): 

– Icc1 (short-circuit current of transformer 1) in the event of a 

fault immediately on the load side of circuit-breaker I1; 

– Icc2 + Icc3 (Icc2 and Icc3 = short-circuit currents of transformers 

2 and 3) in the event of a short-circuit on the supply 

side of circuit-breaker I1. 

Circuit-breakers I4 and I5 on the outgoing lines must have a 

breaking capacity higher than Icc1+Icc2+Icc3. Each trans- 

CAUTION! 

The table is for the conditions specified on the previous page. The 

information for choosing the circuit breakers is only provided in relation to 

the operating current and prospective short-circuit current. To make the 

correct choice one also needs to consider other factors such as selectivity, 

back-up protection, the decision to use current-limiting circuit-breakers, 

etc. It is therefore essential for designers to carry out precise verification. 

The types of circuit-breakers proposed are all from the SACE Emax series. 

former’s contribution to the short-circuit current is naturally attenuated 

by the transformer-circuit-breaker connection line (to 

be determined case by case). 

ASEM0056 

Circuit-breaker A (secondary of transformer) Circuit-breaker B (outgoing user line) 

Number of Rated Prospective Type Rated Total Prospective Rated current Iu and type of circuit-breaker 

transformers current of the short-circuit current of current short-circuit 

in parallel transformer current the CTs available current 

and related L.V. side 

power Sn In Icc In I 

[kVA] [A] [kA] [A] [A] [kA] [A] [A] [A] [A] 

800 1250 1600 2000 

1x500 722 18 E1B08 800 722 18 E1B08* — — — 

2x500 722 18 E1B08 800 1444 36 E2N12* E2N12* — — 

1x630 909 22,7 E1B12 1250 909 22,7 E1B08* — — — 

2x630 909 22,7 E1B12 1250 1818 22,7 E2N12* E2N12* E2N16* — 

3x630 909 45,4 E2N12 1250 2727 68,1 E3S12* E3S12* E3S16* — 

1x800 1155 23,1 E1B12 1250 1155 23,1 E1B08* — — — 

2x800 1155 23,1 E1B12 1250 2310 46,2 E2N12* E2N12* E2N16* — 

3x800 1155 46,2 E2N12 1250 3465 69,3 E3S12* E3S12* E3S16 E3S20 

1x1000 1443 28,9 E2B16 1600 1443 28,9 E1B08* E1B12* E2B16* — 

2x1000 1443 28,9 E2B16 1600 2686 57,8 E3S12* E2S12* E2S16* — 

3x1000 1443 57,8 E3N25 1600 4329 86,7 E2L12* E2L12* E2L16* E3H20 

1x1250 1804 36,1 E2B20 2000 1804 36,1 E2N12* E2N12* E2N16* — 

2x1250 1804 36,1 E2B20 2000 3608 72,2 E3S12* E3S12* E3S16* E3S20 

3x1250 1804 72,2 E3S20 2000 5412 108,3 E2L12* E2L12 E2L16 E3L20 

1x1600 2309 37 E3N25 2500 2309 37 E2B16* E2B16* E2B16* — 

2x1600 2309 37 E3N25 2500 4618 74 E3S12* E3S12* E3S16* E3S20 

3x1600 2309 74 E3S25 2500 6927 111 E2L12* E2L12 E2L16 E3L20 

1x2000 2887 46,2 E3N32 3200 2887 46,2 E2N12* E2N12* E2N16* — 

2x2000 2887 46,2 E3N32 3200 5774 92,4 E2L12* E2L12* E2L16* E3H20 

1x2500 3608 57,7 E4S40 4000 3608 57,7 E3S12* E3S12* E3S16* E3S20 

1x3150 4547 72,7 E6H50 5000 4547 72,7 E3S12* E3S12* E3S16* E3S20 

C.-breaker A C.-breaker B 

Positions marked by an asterisk (*) are suitable for other possible choices 

from the moulded-case circuit-breakers in the SACE Isomax series. 

One also needs to bear in mind that the short-circuit currents shown in the 

table have been calculated on the assumption of infinite power on the 

supply side of the transformers and without taking the impedances of the 

busbars and connections to the circuit-breakers into account. The values 

calculated in this way are higher than the actual values. 

95

Protection of lines 

One needs to know the following information to make the correct 

choice of circuit-breakers for switching and protecting lines: 

– the operating current of the line I B 

– the capacity of the cable IZ – the prospective short-circuit current Icc in the circuit-breaker 

point of installation. 

See the regulations in force and the specific publications for 

determining I B , I z and Icc. 

To be suitable, the circuit-breaker must satisfy the following 

conditions: 

– have a breaking capacity (Icu / Ics) greater than or equal to 

the short-circuit current Icc 

– have a protection release that enables its overload setting 

current In (I1) to satisfy the relationship I < In 

– the specific let-through energy (I2t) let through by the circuitbreaker 

must be less than or equal to that withstood by the 

cable. 

The CEI 64-8 Standards consider that overload protection in 

the release of a level appropriate for the cable is also sufficient 

to protect the cable in the event of a short circuit at the end of 

the line. 

Circuits for which it is recommended or necessary not to provide 

overload protection, or for which this protection must be 

set to values higher than between I B and I Z , require one to verify 

that the short-circuit current at the end of the line is higher than 

the trip threshold of the short-circuit protection device so that 

the latter can trip, ensuring protection. This in effect establishes 

the maximum lengths protected in relation to the various 

different cross-sections of the cables and the various different 

settings of the short-circuit protection devices. 

96 

Note 

For protection against indirect contact, it may be necessary to link the 

setting of the short-circuit protection to the length of the line protected. 

Consult the Slide rule kits and DOC software packages for the calculation 

procedures required. 

The wide range of settings offered by the SACE PR111 and PR112 releases 

always allows the most suitable choice. 

Concerning the verification required by the CEI 64-8 Standards, which 

stipulate that the overload protection must have a trip current If which 

ensures operation for a value less than 1.45 Iz (If < 1.45 Iz), this condition 

is always satisfied since SACE Emax circuit-breakers conform to the CEI 

EN 60947-2 Standards and this value is 1.3 In. 

Special attention must be devoted to the selective co-ordination of circuitbreakers 

in series to limit disservice in the event of faults.

Switching and protection of generators 

SACE Emax circuit-breakers are suitable for use with low voltage 

generators employed in the following applications: 

A - back-up generators for essential users 

B - generators in insulated operation 

C - generators for small power stations connected in parallel 

with other generators and, possibly, with the power supply 

network. 

In cases A and B, the generator does not operate in parallel 

with the power supply network: the short-circuit current 

therefore depends on the generator itself and, possibly, the 

users connected. The short-circuit current is formed following 

complex phenomena. To evaluate it one needs to know the 

reactances and time constants typical of the machine, making 

it necessary to refer to the DOC program or specialist texts. 

Here one can simply note that low short-circuit protection device 

settings are normally required (2 ÷ 4 times In). 

In case C, the breaking capacity must be determined by 

evaluating the short-circuit current imposed by the network in 

the circuit-breaker point of installation. 

The wide setting range offered by SACE PR111 and PR112 

microprocessor-based releases makes SACE Emax circuitbreakers 

perfectly suited to the protection of large generators. 

Protection function “I” allows settings between 1.5 and 12 x In 

(PR111) and between 1.5 and 15 x In (PR112). It is also possible 

to have a trip current range of 0.6 to 10 x In with function “S”. 

If the symmetrical short-circuit current is less than the rated 

current of the generator, it will be necessary to adopt solutions 

providing voltage control. The following solutions are described 

by way of example. 

– Indirect current protection with voltage control acting on the 

circuit-breaker opening release; 

– undervoltage release with electronic time-deley device. 

Table for choosing circuit-breakers for 

protection of generators 

The table shows the rated currents of the circuit-breakers in 

relation to the electrical characteristics of the generators. To 

choose the circuit-breaker one needs to define the breaking 

capacity required by the application. The microprocessorbased 

protection releases available are suitable for all requirements. 

Frequency 50 Hz - Voltage 400 V Frequency 60 Hz - Voltage 450 V 

Rated Rated Rated Rated Rated Rated 

power current current power current current 

of alternator of alternator of circuit-breaker of alternator of alternator of circuit-breaker 

[kVA] [A] [A] [kVA] [A] [A] 

630 909 1250 760 975 1250 

710 1025 1250 850 1091 1250 

800 1155 1250 960 1232 1250 

900 1299 1600 1080 1386 1600 

1000 1443 1600 1200 1540 1600 

1120 1617 2000 1344 - 1350 1724 - 1732 2000 

1250 1804 2000 1500 1925 2000 

1400 2021 2500 1650 - 1680 - 1700 2117 - 2155 - 2181 2500 

1600 2309 2500 1920 - 1900 2463 - 2438 2500 

1800 2598 3200 2160 - 2150 2771 - 2758 3200 

2000 2887 3200 2400 3079 3200 

2250 3248 4000 2700 3464 4000 

2500 3608 4000 3000 3849 4000 

2800 4041 5000 3360 4311 5000 

3150 4547 5000 3780 4850 5000 

3500 5052 6300 4200 5389 6300 

97

Switching and protection of asynchronous motors 

Low-voltage automatic circuit-breakers can ensure the following 

functions on their own in the power supply circuits for asynchronous 

motors: 

– switching 

– overload protection 

– short-circuit protection 

98 

GSEM0140 

M 

A = Circuit-breaker 

B = Overload protection (inverse long time-delay trip) 

C = Short-circuit protection (instantaneous) 

M = Asynchronous motor 

Diagram showing direct starting of asynchronous motor using only 

the circuit-breaker fitted with a microprocessor-based overcurrent 

release. 

This solution is particularly suitable if the switching frequency 

is not high, as is normally the case for large motors. In this 

case, using only the circuit-breaker for the switching and protection 

of the motor represents a solution that is highly advantageous 

due to its competitive cost-efficiency, reliability, ease 

of installation and maintenance and compact dimensions. 

The automatic circuit-breakers in the SACE Emax selective (not 

current-limiting) series are able to provide the motor switching 

and protection function by virtue of their high breaking capacities 

and the wide range of possible settings offered by the 

microprocessor-based releases. 

SACE Emax circuit-breakers are suitable for use with motors 

with rated powers within the range 220 kW to 630 kW. Motors 

with powers of up to 250 kW can also use the moulded-case 

circuit-breakers in the SACE Isomax and SACE Limitor series. 

Medium voltage power supplies are normally used for powers 

above 630 kW. 

The switching of three-phase asynchronous motors demands 

considerable attention to the starting operation, since the current 

during this phase follows the typical behaviour shown in 

t [s] 

GSEM0141 

Behaviour of peak current values in the starting phase of a three-phase 

asynchronous motor. 

the figure, which must be taken into account when choosing 

the protection devices. 

It is essential to calculate the typical values of the times and 

currents indicated in the figure in order to choose the correct 

switching and protection devices for the motor. This data is 

normally provided by the manufacturer of the motor. For an 

approximate estimate, consult the “Guide to the installation 

and sizing of electrical installations” (by ABB SACE L.V.). 

The following relationships generally apply: 

- Ia = 6 ÷ 10 Ie (Ia and Ie: rms values) 

- Ip = 8 ÷ 15 Ia (Ip and Ia: rms values) 

Note 

The current Ip is commonly calculated from its peak value (Ip = 1.4 ÷ 2.5 

Ia): the corresponding rms value is obtained by dividing the result by 1.41. 

I [A] 

Ie = Rated current of the motor 

Ia = Initial value of the transient starting current 

Ip = Maximum instantaneous value of the subtransient starting 

current 

ta = Starting time 

ts = Duration of transient phase

The rated current of the circuit-breaker must be at least 20% 

higher than that of the motor. 

The setting of the protection releases must be chosen to: 

– prevent slow operation in the motor starting phase. 

Caution! 

The curves of the motor and releases are directly comparable in 

that they both express time-current links, but have conceptually 

different meanings: 

– the motor starting curve represents the values assumed by 

the starting current moment by moment; 

– the release curve represents the currents and corresponding 

minimum permanence times which cause tripping of the protection 

device. 

The overload time-current curve is set correctly when it is immediately 

above point A (figure alongside) which identifies the top 

of the rectangle with sides formed respectively by the starting 

time “ta” and the current “Ia” thermally equivalent to the variable 

starting current. The difficulty of calculating point A makes it 

necessary to proceed by trial and error while putting the motor 

into service. 

GSEM0142 

t [s] 

I [A] 

– ensure the installation is protected against the overcurrents 

which might occur at any point on the load side of the circuit-breaker 

(including internal motor faults). 

The inverse long time-delay trip protection and instantaneous 

short-circuit protection must be set as close as possible to the 

motor starting curve without, however, interfering with it. 

Note 

The IEC 947-4-1 standard concerns motor starters. The following classes 

are considered for overload protection: 

Operating Trip time t (s) for I = 7.2 x I1 

class (I1 = release setting current) 

10A 2 < t < 10 

10 4 < t < 10 

20 6 < t < 20 

30 9 < t < 30 

The table specifies that the protection device must trip in a time “t” within 

the limits for the class when the current flowing through the device to be 

protected is 7.2 times the release setting current (assumed to be equal to 

the rated current of the motor). 

The division of the overload devices into classes is closely linked to the 

motor starting time: for example, a motor with a starting time of 18 seconds 

requires a protection device in class 20. 

The same standards provide specific prescriptions for the protection device 

in cases of three-phase operation or with the loss of a phase. 

99

Switching and protection of asynchronous motors 

Three-phase operation 

The overload protection device must ensure tripping in more 

than two hours with currents equal to 1.05 times the rated current 

of the motor and in less than two hours with currents equal 

to 1.2 times the same rated current, as indicated in the table 

below: 

Operation Operation with with the the loss loss of of a a phase 

phase 

Tripping must occur in less than two hours at 20°C in the event 

of the loss of a phase when the current in the energised poles 

reaches 1.15 times the rated current. 

Table for choosing circuit-breakers to be used for motor 

protection 

The table below shows the starting characteristics for large 

motors, from 220 to 630 kW, with circuit-breakers in the SACE 

Emax series for switching and protecting motors in category 

AC-3 - 440 V - 50 Hz. 

The table shows the choice of current transformers able to 

ensure a sufficiently high value for the instantaneous trip threshold 

setting (I): in the absence of experimental data it is advisable 

to verify that the relationship between the threshold of 

protection device I (I3) and the threshold of protection device 

L (I1) is: 

I3/I1 =12 ... 15. 

The SACE PR112 microprocessor-based release conforms to 

the IEC 947-4-1 standard, in particular the device ensures the 

protection of class 10A, 10, 20 and 30 motors with a trip time 

setting for function L at I=7.2 I1 of between 0.52s and 25s with 

I1 the setting current of threshold L. 

The SACE PR112 protection release is temperature-compensated 

and unaffected by phase loss. 

100 

Benefits of earth fault protection G 

Earth fault protection (G) is advisable to: 

– improve safety against fire hazards 

– improve protection of the motor and personnel in the event 

of machine faults. 

Benefits of thermal memory 

The suitability of enabling the thermal memory (option offered 

by SACE PR112 releases) must be evaluated in relation to the 

type of user. Enabling the thermal memory (which makes the 

microprocessor-based protection similar to that provided by a 

thermomagnetic device) increases the protection level of the 

motor in the event of restarting after tripping due to an overload. 

Use of the undervoltage release 

The undervoltage protection device in control systems for asynchronous 

motors demands particular attention, performing, 

amongst other things, two important functions: 

– it prevents simultaneous restarting of all the motors on restoration 

of the power supply, with the risk of causing the entire 

installation to go out of service by tripping the main circuitbreaker 

overcurrent protection devices 

– it prevents restarting of the motor without a control signal, 

which could cause a hazard for maintenance personnel or 

damage to the processing cycle.

I/In 1,05 1.2 1.5 7.2 Operating class 

Tp > 2h < 2h < 120 s 2 < t < 10s 10A 

< 240 s 4 < t < 10s 10 

< 480 s 6 < t < 20s 20 

< 720 s 9 < t < 30s 30 

Motor SACE Emax circuit-breaker Microprocessor-based release 

Pe Ie Operations (AC-3) Type Icu In Type TA 

[kW] [A] [No.] [kA] [A] [A] 

220 408 10000 E1B E1B 

40 800 PR112 PR112 PR112 

800 

250 418 10000 E1B E1B 

40 800 PR112 PR112 PR112 

800 

315 580 10000 E1B E1B 

40 1250 PR112 PR112 

1250 

355 636 10000 E1B E1B 

40 1250 PR112 PR112 

1250 

400 710 10000 E1B E1B 

40 1250 PR112 PR112 PR112 

1250 

450 800 10000 E1B E1B 

40 1250 PR112 PR112 

1250 

500 910 12000 E2B E2B 

40 1600 PR112 PR112 

1600 

560 1020 12000 E2B E2B 

40 1600 PR112 PR112 PR112 

1600 

630 1140 12000 E2B E2B 

40 1600 PR112 PR112 

1600 

220 408 15000 E2N E2N 

65 1250 PR112 PR112 

800 

250 418 15000 E2N E2N 

65 1250 PR112 PR112 

800 

315 580 15000 E2N E2N 

65 1250 PR112 PR112 

1250 

355 636 15000 E2N E2N 

65 1250 PR112 PR112 PR112 

1250 

400 710 15000 E2N E2N 

65 1250 PR112 PR112 PR112 

1250 

450 800 15000 E2N E2N 

65 1250 PR112 PR112 

1250 

500 910 12000 E2N E2N 

65 1600 PR112 PR112 

1600 

560 1020 12000 E2N E2N 

65 1600 PR112 PR112 

1600 

630 1140 12000 E2N E2N 

65 1600 PR112 PR112 

1600 

220 408 12000 E3S E3S 

75 1250 PR112 PR112 

800 

250 418 12000 E3S E3S 

75 1250 PR112 PR112 

800 

315 580 12000 E3S E3S 

75 1250 PR112 PR112 

1250 

355 636 12000 E3S E3S 

75 1250 PR112 PR112 

1250 

400 710 12000 E3S E3S 

75 1250 PR112 PR112 

1250 

450 800 12000 E3S E3S 

75 1250 PR112 PR112 

1250 

500 910 10000 E3S E3S 

75 1600 PR112 PR112 

1600 

560 1020 10000 E3S E3S 

75 1600 PR112 PR112 

1600 

630 1140 10000 E3S E3S 

75 1600 PR112 PR112 PR112 

1600 

220 408 12000 E3H E3H 

100 1250 PR112 PR112 

800 

250 418 12000 E3H E3H 

100 1250 PR112 PR112 PR112 

800 

315 580 12000 E3H E3H 

100 1250 PR112 PR112 

1250 

355 636 12000 E3H E3H 

100 1250 PR112 PR112 

1250 

400 710 12000 E3H E3H 

100 1250 PR112 PR112 

1250 

450 800 12000 E3H E3H 

100 1250 PR112 PR112 

1250 

500 910 10000 E3H E3H 

100 1600 PR112 PR112 

1600 

560 1020 10000 E3H E3H 

100 1600 PR112 PR112 

1600 

630 1140 10000 E3H E3H 

100 1600 PR112 PR112 

1600 

101

Switching and protection of capacitors 

Operating conditions of circuit-breakers 

during continuous service for capacitor 

banks 

In conformity with the IEC 70 and CEI 33-1 Standards, the capacitors 

must be able to operate in service conditions with a 

rated rms current of up to 1.3 times the rated current Icn of the 

capacitor. This prescription is due to the possible presence of 

harmonics in the power supply voltage. 

One also needs to bear in mind that a tolerance of +10% is 

admissible for the capacitance value corresponding to its rated 

power, so that the circuit-breakers for switching capacitor banks 

must be chosen to permanently carry a maximum current equal 

to: 

Imax = 1.3 x 1.1 x Icn = 1.43 x Icn. 

Current for connecting capacitor banks 

Connection of a capacitor bank can be compared to closing 

in short circuit conditions, where the transient making capacity 

Ip has high peak values, above all when capacitor banks 

are connected in parallel with others that are already powered. 

The value of Ip needs to be calculated for each individual situation 

because it depends on the individual circuit conditions 

and may in certain cases even have a peak value equal to 160 

x Icn for a duration of 1 - 2 ms. 

This fact must be taken into account when choosing the circuit-breaker, 

which must have a suitable making capacity, and 

when setting the overcurrent release, which must not cause 

unwarranted trips when the bank is connected. 

102 

Selection of circuit-breaker 

Using the information on the rating plate of the three-phase 

capacitor bank 

Qn = rated power in kVAR 

Un = rated voltage in V 

the rated current of the bank is obtained 

Qn x 10 3 

Icn = , in A. 

3 x Un 

For the circuit-breaker: 

Rated current Iu > 1.43 Icn 

Overload protection setting I1 = 1.43 x Icn 

Short-circuit protection setting I3 = 10 x Iu 

Breaking capacity Icu > Icc, in the point of installation. 

Table for selecting the protection and 

switching circuit-breakers for capacitors 

The breaking capacity of the circuit-breaker must take the prospective 

short-circuit current in the point of installation into 

account. The models possible are shown in the table. 

Maximum power of the Circuit- Rated Rated Overload Short-circuit 

capacitor bank at 50 Hz breaker current of the current of the protection protection 

(kVAR) current capacitor setting setting 

transformer bank 

380 V 440 V 500 V 600 V 660 V 690 V In [A] Icn [A] I1 [A] I3 [A] 

575 667 758 909 1000 1044 E1 - E2 - E3 1250 875 1x In 10 x In 

736 853 970 1164 1280 1336 E2 - E3 1600 1120 1x In 10 x In 

920 1067 1212 1455 1600 1671 E2 - E3 2000 1400 1x In 10 x In 

1150 1334 1515 1819 2000 2088 E3 2500 1750 1x In 10 x In 

1473 1705 1938 2325 2558 2674 E3 - E4 - E6 3200 2238 1x In 10 x In

CONTENTS 


Fixed circuit-breaker 104 

Withdrawable circuit-breaker 108 

Mechanical interlock 113 

Circuit-breaker accessories 114 

103



P84-BN 

33 

104 

Basic version with horizontal rear terminals 

252 

4 

242 

2 

252 242 

M10 

1 

N 

Y 

A 

B 

Y 

A 

C 

D 

397 

Y 

4 POL 

307 

3 POL 

View A 

4 

90 

35 

90 90 

60 

ø1 

View A 

33 

18 

N 

2 

Max +40 

Max +40 

1 

M10 

45 

240 

330 

Y 

541 

415 

126 126 126 

35 

63 

348 

474 

3 POL 

3 POL 

4 POL 

418 

96 

4 POL 

3 

80 

E 

440 min. 

379 

X X 

F E 

312 

ø1 

3 

18 

G 

16.5 

E1/E2 E4 

E3 

View A 

E1 

E2 

E3 

E4 

E6 

A B C D E 

386 

386 

530 

656 

908 

296 

296 

404 

566 

782 

148 

148 

202 

238 

328 

148 

148 

202 

328 

454 

10 

26 

26 

26 

26 

3 POL 

4 POL 

4 POL 

3 POL 

3 POL 

4 POL 

F G 

130 117.5 

114 117.5 

114 117.5 

166 91.5 

166 91.5 

33 

E6 

5 

177 

4 

View A 

66 

66 

33 

2 

252 242 

M10 

Max +40 

33 

66 

2 

49 

89 50 

10 

4 

252 242 

M10 

Max +40 

1 

96 

35 35 

N 

1 

192.5 

60 

N 

Max 

Min 

Y 

180 

577 

35 

180 

600 

Y 

13 

150 

135 

45 

510 

667 

180 180 

252 

793 

63 

726 

919 

189 

252 

35 35 56 35 35 

Caption 

1 Inside edge of compartment door 

2 Segregation (when provided) 

3 M10 mounting holes for fixed part 

(use M10 screws) 

4 1 x M12 screw(E1, E2, E3) or 

2 x M12 scrws (E4, E6) for earthing 

(supplied as standard) 

5 Insulating wall or insulated metal wall 

852 

Y 

252 

222 

252 

3 POL 

ø1 

18 

3 

222 

4 POL 

3 

3 POL 

ø1 

18 

4 POL 

ø1 

3 

18


P85-BN 

Version with vertical rear terminals 

E1 E2/E4 E3/E6 

166 

80 

35 

104.5 

20 

90 

90 

10 

ø1 

A A A 

50 48 

166 

80 

35 

104.5 

20 

ø1 

50 48 

N N 

90 

90 

10 10 

10 

N 

166 

100 

35 

104.5 

20 

View A View A View A 

180 

135 

90 

10 10 

10 

252 

189 

126 

126 

126 

10 10 10 10 

12 12 12 

12 12 12 

ø1 

50 48 

E1 E2 E3 

M12 screws 

supplied 

as standard 

E4 E6 

N 

N 

105



P86-BN 

106 

Version with front terminals 

460 

460 

E1 E2 

460 

10 

42.5 

68 

35 60 

90 90 

E3 E4 

10 

E6 

10 

10 

20 20 

88 

42.5 

10 

20 20 

88 

42.5 

126 

252 

N 

35 96 

126 

N 

20 

ø1 

20 

ø1 

N 

56 

222 

35 96 

189 

460 

460 

10 

20 

ø1 

10 

10 

20 20 

88 

10 

20 20 

88 

42.5 

42.5 

35 60 

90 90 

180 

N 

135 

20 

ø1 

N 

35 60 

150 

20 

ø1


P87-BN 

Dimensions of compartment Holes in compartment door 

500 

73.5 

E1 

E2 

E3 

E4 

E6 

20 

B 

A B 

400 

400 

500 

700 

1000 

A 

135 

180 

490 

490 

630 

790 

1130 

3 POLI 

4 POLI 

Holes for passing through flexible 

cables for mechanical interlocks 

10 

242 Min 

282 Max 

38.5 

40 

Depth 

N E1/E2 2 2 

N 

X 339 100 

374 384 X 

2 holes for IP54 

protection 

N 

N 

R2 

E3 

E4 

E6 

Y 

316 

306 

ø5 100 100 

100 

100 

168.5 

Tightening torque for main terminals 70 Nm 

Tightening torque for earthing screw Nm 70 

150 

Y 

ø5 

High strength M12 screw 

Number per terminal 

PHASE NEUTRAL 

3 3 

4 2 

6 3 

107

Overall Dimensions 

Withdrawable circuit-breaker 

P88-BN 

33 

393.5 

380 

108 

Basic version with horizontal rear terminals 

15 

1 

4 

E1 

E2 

E3 

E4 

E6 

Y A 

A 

B 

461 

E 

465 

X 

140 E 

124.5 

2 

2 

45 

129 

4 

183 

528 

138 

240 

200 200 

90 

60 

417 

90 90 

4 POL 

15 

126 

96 

561 

126 126 

4 POL 

15 

60 

135 

150 

687 

180 180 

N 

45 

33 

N 

63 

33 

N 

174 

309 

618 

3 393.5 

33 

40 

3 

393.5 

33 

40 

380 

84 

380 

84 

220 

199.5 

465 

min 

Y 

597 

180 

150 35 35 35 

5 

3 

34 13 

ø1 

1 

370 

F 

ø1 

1 

245 

F 

245 

ø1 

Y 

E6 

252 

813 

252 

3 POL 

222 35 35 56 35 35 

ø1 

A B C D E 

414 

414 

558 

684 

936 

324 

324 

432 

594 

810 

3 POL 

162 

162 

216 

252 

342 

4 POL 

C 3 POL 

D 

4 POL 

56 240 49 

Y 

Y 

Y 

E1/E2 327 

90 90 

3 POL E3 

435 

126 126 

3 POL 

E4 

60 35 ø1 

96 35 35 ø1 

View A View A 

Caption 

1 Inside edge of compartment door 

2 Segregation (when provided) 

3 10 Ø mounting holes for fixed part (use M8 screws) 

4 1 x M12 screw(E1, E2, E3) or 2 x M12 screws 

(E4, E6) for earthing (supplied as standard) 

5 Travel from connected for TEST to isolated 

F Fixed part ventilation drilling 

162 

162 

216 

342 

468 

122 

10 

8 

8 

8 

8 

E1 E2 / E3 / E4 / E6 

F 

3 POL 4 POL 

– 

– 

370 

530 

750 

– 

– 

490 

610 

870 

33 

View A 

15 

33 

393.5 40 

380 

84 

122 

1 

96 

N 

189 

E 

10 

465 

X 

140 E 

10 

124.5 E 

View A 

122 

63 

744 

310 310 

222 

5,5 Max 

56 

939 

252 252 

870 

240 49 

370 370 

F 

199.5 

6 

465 

min 

ø1 

2 

4 

X 

3 POL 

2 

4 

ø1 

4 POL 

3 

3 

4 POL


P89-BN 

Version with vertical rear terminals 

E1 E2/E4 E3/E6 

114 

80 

35 

ø1 

137.5 

137.5 

20 

90 

90 

10 

A A A 

50 3 

N 

114 

80 

35 

137.5 

20 

90 

10 

10 

10 

90 

180 90 

10 

10 

10 

90 

135 

ø1 

50 3 

N 

N 

134 

100 

35 

127.5 

20 


126 

126 

252 

12 

10 

12 

10 

12 

126 

189 

10 10 

12 12 12 

ø1 

50 3 

E1 E2 E3 

M12 screws 

supplied 

as standard 

E4 E6 

N 

N 

109



P90-BN 

460 

10 

460 

460 

110 

Version with front terminals 

E1 E2 

10 

E3 

35.5 

71 

20 20 

91 

E6 

10 

10 

35.5 

10 

20 20 

91 

35.5 

90 90 

N 

35 60 

35 35 100 

126 126 

20 

ø1 

20 

ø1 

N 

90 90 

N 

35 60 

10 

N 10 

N 

35 35 100 

126 126 

252 189 

460 

10 

E4 

460 

10 

20 20 

91 

20 20 

91 

35.5 

35.5 

20 

ø1 

60 60 

70 

180 135 

20 

ø1 

60 ø1 

20


P91-BN 

Version with flat terminals 

114 

137.5 

90 

90 

M12 

35 

A 

A 

E1 E2/E6 

3 

45 62 

60 N 

60 

N 

90 

90 

180 

35 

150 35 

35 

135 

60 

35 

N 

114 

137.5 


M12 

E1 E2 E3 

126 

126 

View A View A 

252 

189 

96 

35 

222 56 

96 

35 

35 

E4 E6 

35 

3 

N 

N 

111



P92-BN 

112 

Dimensions of compartment Holes in compartment door 

500 

Holes for passing through flexible 

cables for mechanical interlocks 

35 

E1 

E2 

E3 

E4 

E6 

20 

A B 

400 

400 

500 

700 

1000 

210 

490 

490 

630 

790 

1130 

B 

100 

A 

50 

35 50 

380 

3 POLI 

4 POLI 

40 

N E1/E2 2 2 

N 

N 

N 

X 339 100 

374 384 X 

2 holes for IP54 

protection 

R 

E3 

E4 

E6 

Y 

316 

306 

ø 100 100 

100 

100 

168.5 

Tightening torque for fixing screws Nm 20 

Tightening torque for main terminals 69 Nm 

Tightening torque for earthing screw Nm 70 

150 

Y 

ø 

High strength M12 screw 

Number per terminal 

3 3 

4 2 

6 3

Cable assembly interlock fitting 

P93-BN 

Min 500 - Max 750 

Min 500 - Max 750 Min 500 - Max 750 

4 

2 

2 

4 

Type A 

Horizontal 

Vertical 

5 6 

3 

3 4 

1 2 

5 1 

4 

Type D 

2 

6 

Horizontal 

Vertical 

Min 500 - Max 750 Min 500 - Max 750 

6 

4 

1 

1 2 

4 

2 

Type B 

6 

(emergency 

interlock 

underneath) 

Horizontal 

Vertical 

Min 500 - Max 750 Min 500 - Max 750 

3 

6 

2 

4 

2 

4 

3 

Type B 

6 

(emergency 

interlock in 

middle) 

Horizontal 

Vertical 

Horizontal interlocks 

Maximum distance between two 

interlocks 1200 mm from one 

interlock to the other. The cables 

pass under the fixed parts, 

following the same connection 

layout shown for vertical circuitbreakers. 

Take up the excess cable by 

making it go through one complete 

turn only or an omega as 

shown in the figure. 

Min 500 - Max 750 Min 500 - Max 750 

5 6 

4 

2 

4 

5 

6 

Type B 

(emergency 

interlock above) 

Horizontal 

Vertical 

Notes 

2 

Min 500 - Max 750 Min 500 - Max 750 

5 6 

3 

3 4 

1 2 

5 1 

When fitting interlocks between two circuitbreakers 

one has to make suitable holes (through 

the switchboard) in the mounting surface for 

fixed circuit-breakers or for the fixed part of 

withdrawable circuit-breakers in order to pass 

through the flexible cables, respecting the 

measurements shown in the figures on pages 87 

and 92. For vertical interlocks, align the righthand 

sides vertically and reduce the bends in 

the flexible cables to a minimum (radius R. 70 

mm). All the angle values of the bends which the 

cable passes through added together must not 

exceed 720°. 

4 

Type C 

2 

6 

Horizontal 

Vertical 

113


Circuit-breaker accessories 

X 

31,5 

X 

20 

P94-BN 

933506B 

114 

Compartment door mechanical interlock 

Holes in compartment 

door 

Y 

Y 

180 

ø6 

73.5 

Current transformer for the external 

neutral 

Minimum distance between circuit-breaker and switchboard wall 

Fixed version Withdrawable version 

933506C 

35 

Homopolar toroid

933629A 

PAG94B 

Electrical signalling of circuit-breaker open/closed 

15 additional auxiliary contacts 

250 

“A” 

Fixed version 

A flexible cable 600 mm long is available from point "A" to 

point "B" 

50,5 50,5 

“A” 

250 


115

116

CONTENTS 

Electrical circuit diagrams 

Operating state shown 118 

Circuit diagram symbols 119 

Electrical circuit diagrams 120 

117


Operating state shown 

The circuit diagrams are for the following conditions: 

• withdrawable version of circuit-breaker, open and connected 

• circuits de-energised 

• releases not tripped 

• motor operating mechanism with springs charged. 

118 

Versions 

The circuit diagrams show withdrawable circuit-breakers but 

are also valid for fixed circuit-breakers. 

Fixed version 

The control circuits are between terminals XV (connector X is 

not supplied). 

With this version, the applications indicated in figures (31, 32, 

51) cannot be provided. 


The control circuits are between the poles of connector X (terminal 

box XV is not supplied). 

With this version, the application indicated in figure (52) cannot 

be provided. 

Version without overcurrent release 


13, 41, 42, 51, 52) cannot be provided. 

Version with PR111 or PR112/P 

microprocessor-based release 

The PR111 and PR112/P releases are fitted with the protection 

unit only. 


41, 42) for PR111 and (3, 5, 22, 42) for PR112/P, cannot be 

provided. 

Version with PR112/PD microprocessorbased 

release 

The PR112/PD overcurrent release is fitted with the protection 

and dialogue unit. 

With this version, the application shown in figure (22) cannot 

be fitted.

Circuit diagram symbols (IEC 617 and CEI 3-14...3-26 Standards) 

Timing 

IEC 617 02-08-05 

Mechanical connection 

IEC 617 02-12-01 

Mechanical operating mechanism 

IEC 617 02-13-01 

Rotary operating mechanism 

IEC 617 02-13-04 

Pushbutton control 

IEC 617 02-13-05 

Equipotential 

IEC 617 02-15-05 

Galvanicallyseparated 

converter 

IEC 617 02-17-06/02-17-07 

Conductors in shielded 

cable 

(example: 3 conductors) 

IEC 617 03-01-07/03-01-09 

Stranded conductors 

or cables 

(example: 3 conductors) 

IEC 617 03-01-08 

Conductor connections 

IEC 617 03-02-01 

M 

Terminal or clamp 

IEC 617 03-02-02 

Socket and plug 

(female and male) 

IEC 617 03-03-05 

Motor 

(general symbol) 

IEC 617 06-04-01 

Current transformer 

IEC 617 06-13-11 

Winding of three-phase 

transformer, connection star 

IEC 617 06-10-08 

Make contact 

IEC 617 07-02-01 

Break contact 

IEC 617 07-02-03 

Change-over break before make 

contact 

IEC 617 07-02-04 

Make position contact 

(limit switch) 

IEC 617 07-08-01 

Break position contact 


IEC 617 07-08-02 

Change-over position contact 

with momentary interruption 


– 

Power circuit-breaker-isolator with 

automatic opening 

IEC 617 07-13-05/07-01-03/07-01-05 

Switch-disconnector 

IEC 617 07-13-08 

Control coil 

(general symbol) 

IEC 617 07-15-01 

Instantaneous overcurrent 

release 

IEC 617 07-16-01 

Overcurrent release with 

adjustable short time-delay 

trip 

IEC 617 07-16-01 

Overcurrent release with 

inverse short time-delay trip 

IEC 617 07-16-01 

Overcurrent release with inverse 

long time-delay trip 

IEC 617 07-16-01 

Earth fault overcurrent release with 

inverse short time-delay trip 

IEC 617 07-16-01 

Current sensor 

IEC 617 09-09-09 

119


120 

VSEM0077 

VSEM0077 

Q 

Three-pole or four-pole circuit-breaker with SACE PR111, PR112/P or PR112/PD 

mricroprocessor-based release 

TI/L1 

TI/L2 

TI/L3 

TI/N 

UI/L1 

UI/L2 

UI/L3 

UI/N 

N L1 L2 L3 

T11 

T12 

T21 

T22 

T31 

T32 

T41 

T42 

T13 

T14 

T23 

T24 

T33 

T34 

T43 

T44 

XK1 

T11 

T12 

T21 

T22 

T31 

T32 

T41 

T42 

XK 

T13 

T14 

T23 

T24 

T33 

T34 

T43 

T44 

K51 

PR111 

PR112/P 

PR112/PD 

Three-pole or four-pole switch-disconnector 

Q 

N L1 L2 L3 

XO 

1 1 

XO 

2 2 

Y01 

PE 

XK1 XV X 

T5 T5 T5 T5 

T6 T6 T6 T6 

N L1 L2 L3 

TI/O 

(*G) 

4 

3 

2 

1

Control 

circuits 

1 

Signalling 

contacts 

VSEM0078 

13 

21 22 

11 

External 


Conn. (X) 

Term. (XV) 

2 

3 

6 

7 

4 

5 

Term. (XV) 

Conn. (X) 

External 


12 

1 

Motor for 

charging 

closing 

springs 

11 

U1 

X1 1 

M 

U1 

U1 

X1 2 

U2 

37 

S33M/1 

U2 

U2 

37 

37 

X2 1 

X2 2 

38 

38 

38 

2 3 4 5 

Closing 

release 

SC 

C1 

X3 1 

C1 

C1 

X3 2 

C2 

C2 

C2 

(*) See note indicated by the letter on page 126 

External 


Conn. (X) 

Term. (XV) 

Term. (XV) 

Conn. (X) 

External 


Internal circuit Internal circuit 

Segnalling 

springs 

charged 

S33M/2 YU 

SC 

C1 

X3 1 

X3 2 

C2 

13 

S43 

C1 

C1 

C2 

C2 

C3 

C3 

C3 

XK3 28 

K51 

YC 

XK3 

26 

SO 

C11 

X4 1 

C11 

C11 

X4 2 

C12 

21 

C12 

C12 

SO 

C11 

X4 

X4 2 

C12 

S43 

C11 

C11 

C12 

C12 

C13 

C13 

C13 

XK3 14 

K51 

YO 

XK3 16 

6 (*B) 7 

(*B) 

D1 

D1 

D1 

1 X5 1 

SO SO 

YC YC YO YO YU YU 

12 

(*B) 

Signalling undervoltage 

release 

energised 

D13 

X6 1 

X6 2 

D14 

D13 

D13 

D14 

D14 


Closing release 

with control of 

dialogue unit 

96 

96 

96 

98 

98 

98 

X7 2 3 

S51 

X7 1 

95 

95 

95 

Opening 

release 

Signalling circuitbreaker 

open due to 

overcurrent release 

trip 

13 

Q/1 

14 

13 

13 

14 

14 

Opening release 

with control of 

dialogue unit 

First set of circuitbreaker 

auxiliary 

contacts 

11 

Q/2 

12 

11 

11 

12 

12 

23 

Q/3 

24 

23 

23 

24 

24 

21 

Q/4 

22 

21 

21 

22 

22 

33 

Q/5 

Istantaneous 

undervoltage 

release 

22 

34 

33 

33 

34 

34 

X5 2 

D2 

31 

Q/6 

32 

D2 

D2 

31 

31 

32 

32 

43 

Q/7 

44 

Undervoltage 

release with 

electronic timedelay 

device 

43 

43 

44 

44 

41 

Q/8 

42 

41 

41 

42 

42 

D1 

D1 

D1 

X5 1 

X5 2 

53 

Q/9 

54 

D2 

Second set of circuit-breaker 

auxiliary contacts 

(excluded PR112/P, PR112/PD) 

D2 

D2 

53 

53 

54 

54 

D 

51 

Q/10 

52 

51 

51 

52 

52 

121


Signalling 

contacts 

122 

31 32 

Protection 

unit 

VSEM0079 

41 

External 


Fixed part 

terminal box 

Fixed part 

terminal box 

External 


31 

First set of circuit-breaker signalling contacts 

(connected, withdrawn, racked-out) 

41 

104 

S75I/1 

104 

4 2 

101 

1 

101 

S75I/2 

112 

111 

4 2 

1 

112 

111 

S75E/1 

124 


External 


Conn. (X) 

Term. (XV) 

Term. (XV) 

Conn. (X) 

External 


Fixed part circuit 

Auxiliary circuits of 

PR112/P release 

Internal circuit 

(*F) 

K51 

– 

+ 

K1 

XK2 8 

K1 

K1 

Uaux. 

24V 

K2 

XK2 9 

K2 

K2 

K3 

2 4 

121 

K3 

K3 

XK3 22 

K51 

µP 

XK3 

K4 

K4 

K4 


24 

1 

124 

121 

K5 

134 

S75R/1 

K5 

K5 

XK3 18 

K51 

pL 

XK3 

K6 

20 

K6 

K6 

2 4 

131 

1 

K7 

134 

131 

142 

S75R/2 

K7 

K7 

XK3 2 

K51 

YO1 

XK3 

K8 

30 

K8 

K8 

142 

2 4 

141 

K9 

1 

141 

K9 

K9 

XK2 16 

XK2 

K51 

Zin 

K11 

7 

K11 

K11 

K10 

32 

K10 

K10 

XK2 15 

K51 

Zout 

Second set of circuit-breaker signalling 

contacts (connected, withdrawn, racked-out) 

154 

S75I/3 

XK2 

W3 

154 

4 2 

151 

10 

W3 

W3 

1 

151 

XK2 

W4 

S75I/4 

19 

W4 

W4 

(A)(B)( ) 

W2 

162 

4 2 

161 

XK2 

CC2 

162 

1 

161 

S75E/2 

174 

PR112/P 

1 

CC2 

CC2 

2 4 

171 

174 

1 

171 

S75R3 

184 

2 4 

181 

184 

1 

181 

192 

S75R/4 

192 

2 4 

191 

1 

191 

(*F)

Dialogue 

unit 

VSEM0080 

42 

External 


Conn. (X) 

Term. (XV) 

Term. (XV) 

Conn. (X) 

External 


42 

Auxiliary circuits of 

PR112/PD release 

Internal circuit 

(*F) 

K51 

– 

+ 

K1 

XK2 8 

K1 

K1 

Uaux. 

24V 

K2 

XK2 9 

K2 

K2 

K3 

K4 

K3 

K3 

XK3 22 

K51 

µP 

XK3 


24 

K4 

K4 

K5 

K6 

K5 

K5 

XK3 18 

K51 

pL 

XK3 

20 

K6 

K6 

K5 

K8 

K7 

K7 

XK3 2 

K51 

Y01 

XK3 

30 

K8 

K8 

K9 

K11 

K9 

K9 

XK2 16 

XK2 

K51 

Zin 

7 

K11 

K11 

K10 

K10 

K10 

XK2 15 

K51 

Zout 

K12 

XK2 6 

XK2 

Q 

W1 

K12 

K12 

17 

W1 

W1 

(*E) 

Q 

K13 

W2 

K13 

K13 

XK2 13 

XK2 

5 

W2 

W2 

(A)(B)( ) 

W1 

S75I 

K14 

CC1 

K14 

K14 

XK2 11 

XK2 

(*D) 

4 

S33M 

2 

CC1 

CC1 

K15 

W3 

K15 

K15 

XK2 12 

XK2 

10 

W3 

W3 

K16 

W4 

K16 

K16 

XK2 14 

XK2 

19 

W4 

W4 

(A)(B)( ) 

W2 

XK2 

CC2 

PR112/PD 

1 

(*D, E, F) 

CC2 

CC2 

123


SACE PR111, PR112/P or PR112/PD 

release and current transformer on 

external neutral conductor 

TI/N 

UI/N 

PE 

124 

PE 

N 

L1 L2 L3 

TI/O 

4 

3 

2 

1 

N 

Q 

TI/L1 

TI/L2 

TI/L3 

UI/L1 

UI/L2 

UI/L3 

L1 L2 L3 

(*G) 

X XV 

TT5 

T5 T5 

TT6 

T6 T6 

XK1 

T11 T11 

T12 T12 

T21 T21 

T22 T22 

T31 T31 

T32 T32 

XK1 

T5 

T5 

VSEM0081 Three-pole circuit-breaker with 


K51 

T13 

XK1 

T13 

T14 T14 

T23 T23 

T24 T24 

T33 T33 

T34 T34 

PR111 

PR112/P 

PR112/PD 

XO 

1 

1 

XO 

2 2 

XK1 

T41 

T42 

T44 

T43 

Y01 

T41 

T42 

T44 

T43 

51 52 


of circuit-breaker 

T1 

T41 

T43 

T3 

T1 

T3 

T2 

T42 

T44 

T4 

T2 

T4 

104 

101 

104 112 124 134 142 

112 

S75I/1 S75I/2 S75E/2 S75R/1 S75R/2 

1 1 1 1 1 

111 

124 

121 

134 

131 

142 

4 2 4 2 2 4 2 4 2 4 

141 

101 111 121 131 141 

Fixed version 

of circuitbreaker 

T1 

T41 

T43 

T3 

(*C 

T1 

T3 

T2 

T42 

T44 

T4 

T2 

T4 

External 


Fixed part 

terminal box 

Fixed part 


Connector 

Internal 


Terminal

Caption 

D = Electronic time-delay device for undervoltage 

release, outside circuit-breaker 

K51 = PR111, PR112/P or PR112/PD microprocessorbased 

overcurrent release with the following 

protection functions(see note on page 126) 

L overload protection with inverse long timedelay 

trip - setting I1 

S short-circuit protection with inverse or defi 

nite short time-delay trip - setting I2 

I short-circuit protection with instantaneous 

time-delay trip - setting I3 

G earth-fault protection with inverse short timedelay 

trip - setting I4 

K51/YC = Closing control from PR112/P and PR112/PD microprocessor-based 

release 

K51/YO = Opening control from PR112/PD microprocessor-based 

release 

K51/YO1 = Electrical signalling of alarm due to tripping of release 

YO1 (for PR112/P and PR112/PD releases only) 

K51/Zin = Zone selectivity: input (with Uaux and PR112/P - 

PR112/PD releases only) 

K51/Zout = Zone selectivity: output (with Uaux and PR112/P - 

PR112/PD releases only) 

K51/pL = Electrical signalling of protection function L in prealarm 

zone (with Uaux and PR112/P - PR112/PD 

releases only) 

K51/μP = Electrical signalling of alarm due to microprocessor 

operating faults (with Uaux and PR112/P - PR112/PD 

releases only) 

M = Motor for charging the closing springs 

Q = Circuit-breaker 

Q/110 = Auxiliary contacts of the circuit-breaker 

S33M/1 = Limit contact of spring-charging motor 

S33M/2 = Contact for electrical signalling of springs charged 

S43 = Change-over contact for setting remote/local control 

S51 = Contact for electrical signalling of circuit-breaker open 

due to tripping of the overcurrent release. The circuitbreaker 

can only be closed after the reset pushbutton 

has been pressed 

S75I/1…4 = Contacts for electrical signalling of circuit-breaker in 

connected position (for withdrawable circuit-breakers 

only) 

S75E/1…4 = Contacts for electrical signalling of circuit-breaker in 

withdrawn position (for withdrawable circuit-breakers 

only) 

S75R/1…4 = Contacts for electrical signalling of circuit-breaker in 

racked-out position (for withdrawable circuit-breakers 

only) 

SC = Pushbutton or contact for closing the circuit-breaker 

SO = Pushbutton or contact for opening the circuit-breaker 

TI/L1 = Current transformer located on phase L1 



TI/N = Current transformer located on neutral 

TI/O = Homopolar current transformer, located on the 

conductor connecting the star centre of the MV/LV 

tranformer to earth (see note G) 

UI/L1 = Current sensor (Rogowski coil) located on phase 

L1 


L2 


L3 

UI/N = Current sensor (Rogowski coil) located on neutral 

Uaux. = Auxiliary power supply (see note F) 

W1 = Serial interface with the control system (external 

bus): EIA RS485 interface (see note E) 

W2 = Serial interface with the accessories of the PR112/ 

P and PR112/PD release (internal bus) 

X = Delivery connector for auxiliary circuits of withdrawable 


X1...X7 = Connectors for circuit-breaker applications 

XF = Delivery terminal board for the position contact of the 

withdrawable circuit-breaker (applied to the fixed part 

of the circuit-breaker) 

XK1 = Connector for the power circuits of PR111, PR112/ 

P and PR112/PD releases 

XK2, XK3 = Connector for the auxiliary circuits of PR112/P and 

PR112/PD releases 

XO = Connector for release YO1 

XV = Delivery terminal board for auxiliary circuits of fixed 


YC = Shunt closing release 

YO = Shunt opening release 

YO1 = Overcurrent shunt opening release 

YU = Undervoltage release (see note B) 

125


126 

Incompatibility 

The circuits shown in the following figures cannot be provided on the same circuit-breaker at 

the same time: (2 - 3) 

(4 - 5) 

(6 - 7) 

(22 - 41 - 42) 

(31 - 51) 

(51 - 52) 

Notes 

Notes 

A) The circuit-breaker is only fitted with the applications specified in the ABB SACE L.V. order 

acknowledgement. 

B) The undervoltage release is supplied for operation using a power supply branched on the 

supply side of the circuit-breaker or from an independent source. The circuit-breaker can 

only close when the release is energised (there is a mechanical lock on closing). 

If the same power supply is used for the closing and undervoltage releases and one wants 

automatic closing of the circuit-breaker on return of the auxiliary power supply, it is necessary 

to insert a 30 millisecond delay between the undervoltage release accept signal and 

energisation of the closing release. This can be obtained using a circuit outside the circuitbreaker 

which comprises a permanently closed contact, the contact indicated in figure (12) 

and a time-delay relay. 

C) For fixed circuit-breakers with current transformers on the neutral conductors outside the 

circuit-breakers, the terminals of transformer TI/N must be short-circuited when one wants 

to remove the circuit-breaker. 

D) Connect contact S33M/2 shown in Fig. (11), one of the make contacts and one of the break 

contacts of the circuit-breaker shown in Fig. (21) and one of the S75I contacts shown in Fig. 

(31) or (51) as shown in Fig. (42). 

On fixed circuit-breakers, connect terminal XV-K14 directly to terminal XV-K16 (contact S75I 

does not exist). 

E) See the following documents on how to connect the EIA RS485 serial line: 

– examples of EIA RS485 serial communication distribution = 401517 

– prescriptions for laying EIA RS485 serial communication cable = 601823. 

F) Auxiliary voltage Uaux. is necessary to guarantee that the following functions of SACE 

PR112/P releases will operate correctly even without self-supply (primary currents lower 

than 0.28 In): 

– current measurement 

– protection against earth fault and relative signals 

– K51/µp and K51/pL signals 

The auxiliary voltage Uaux. is always necessary to guarantee correct operation of the dialogue 

unit (for SACE PR112/PD release only). 

The presence of a primary current > 0.28 In on at least one phase fitted with current transformer 

guarantees the correct operation of all protection and measurement functions. 

G) Earth fault protection is available with the PR112/P and PR112/PD release by means of a 

current transformer located on the conductor connecting the star centre of the MV/LV transformer. 

The connection between terminals 1 and 2 of the TI/O current transformer and poles 

T5 and T6 of connector X must be made with a two-pole shielded and corded ABB SACE 

L.V. type T54602 cable with a length not exceeding 5 m. The shield must be earthed on the 

circuit-breaker side.

INDEX 


SACE Emax E1 Circuit-breaker 128 





SACE Emax E1/MS Switch-disconnector 150 





SACE Emax CS Isolating truck 162 

SACE Emax MTP Earthing switch 163 

SACE Emax MT Earthing truck 164 

SACE Emax PF Fixed parts 165 

Circuit-breaker and fixed part accessories 167 

Microprocessor-based releases 

and current transformer 172 

Conversion kit for fixed circuit-breaker or 

fixed parts 173 

127

128




F = FIXED → E1B 08 I u (40 °C) = 800A I cu (415 V) = 40kA 

Microprocessor-based PR111 code 1SDA0 R1 PR112 code 1SDA0 R1 PR112 code 1SDA0 R1 

release P 3 poles 4 poles P 

3 poles 4 poles PD 3 poles 4 poles 

HR = Horizontal 

rear terminals 

E1B 08 F HR I n 800 A LI 37527 39000 

LSI 37861 39003 LSI 38195 39009 LSI 38199 39015 

LSIG 38192 39006 LSIG 38198 39012 LSIG 38205 39018 

VR = Vertical 


E1B 08 F VR I n 800 A LI 38372 39022 

LSI 38375 39025 LSI 38381 39031 LSI 38387 39037 

LSIG 38378 39027 LSIG 38384 39034 LSIG 38390 39040 

F = Front 

terminals 

E1B 08 F F I n 800 A LI 38394 39044 

LSI 38397 39047 LSI 38403 39053 LSI 38409 39059 

LSIG 38400 39050 LSIG 38406 39056 LSIG 38412 39062 



release P 3 poles 4 poles P 3 poles 4 poles PD 3 poles 4 poles 



E1B 12 F HR I n 1250 A LI 39092 39205 

LSI 39093 39208 LSI 39101 39217 LSI 39109 39225 

LSIG 39097 39213 LSIG 39105 39221 LSIG 39113 39229 

VR = Vertical 


E1B 12 F VR I n 1250 A LI 39118 39234 

LSI 39122 39238 LSI 39130 39246 LSI 39138 39254 

LSIG 39126 39242 LSIG 39134 39250 LSIG 39142 39258 

F = Front 

terminals 

E1B 12 F F I n 1250 A LI 39147 39263 

LSI 39151 39267 LSI 39159 39275 LSI 39167 39283 

LSIG 39155 39271 LSIG 39163 39279 LSIG 39171 39287 

129




W = WITHDRAWABLE → E1B 08 I u (40 °C) = 800A I cu (415 V) = 40kA 



E1B 08 W MP I n 800 A LI 38978 39066 

LSI 38981 39069 LSI 38987 39075 LSI 38993 39081 

LSIG 38984 39072 LSIG 38990 39078 LSIG 38996 39084 





E1B 12 W MP I n 1250 A LI 39176 39292 

LSI 39180 39296 LSI 39188 39304 LSI 39196 39312 

LSIG 39184 39300 LSIG 39192 39308 LSIG 39200 39316 

W = WITHDRAWABLE → Fixed parts 



130 

code 1SDA0 R1 

3 poles 4 poles 

E1 W FP HR 37821 37826 

VR = Vertical 


E1 W FP VR 37872 37877 

F = Front 

terminals 

E1 W FP F 37922 37927 

FL = Flat 

terminals 

E1 W FP FL 37972 37977




F = FIXED → E2N 12 I u (40 °C) = 1250A I cu (415 V) = 65kA 





E2N 12 F HR I n 1250 A LI 39673 39788 

LSI 39677 39792 LSI 39685 39800 LSI 39693 39813 

LSIG 39681 39796 LSIG 39689 39803 LSIG 39697 39809 

VR = Vertical 


E2N 12 F VR I n 1250 A LI 39702 39817 

LSI 39706 39821 LSI 39714 39829 LSI 39722 39837 

LSIG 39710 39824 LSIG 39718 39833 LSIG 39726 39841 

F = Front 

terminals 

E2N 12 F F I n 1250 A LI 39730 39846 

LSI 39734 39850 LSI 39742 39858 LSI 39750 39866 

LSIG 39738 39854 LSIG 39746 39862 LSIG 39754 39870 

F = FIXED → E2L 12 I u (40 °C) = 1250A I cu (415 V) = 130kA 





E2L 12 F HR I n 1250 A LI 43390 40337 

LSI 43394 40341 LSI 43402 40349 LSI 43410 40357 

LSIG 43398 40345 LSIG 43406 40353 LSIG 43414 40361 

VR = Vertical 


E2L 12 F VR I n 1250 A LI 40234 40366 

LSI 40238 40370 LSI 40246 40378 LSI 40254 40386 

LSIG 40242 40374 LSIG 40250 40382 LSIG 40258 40390 

F = Front 

terminals 

E2L 12 F F I n 1250 A LI 40263 40395 

LSI 40266 40399 LSI 40275 40407 LSI 40283 40415 

LSIG 40271 40403 LSIG 40279 40411 LSIG 40287 40419 







E2B 16 F HR I n 1600 A LI 39320 39408 

LSI 39323 39411 LSI 39329 39417 LSI 39335 39423 

LSIG 39326 39414 LSIG 39332 39420 LSIG 39338 39426 

VR = TerminaliVR = Vertical 


E2B 16 F VR I n 1600 A LI 39342 39430 

LSI 39345 39433 LSI 39351 39439 LSI 39357 39445 

LSIG 39348 39436 LSIG 39354 39442 LSIG 39360 39448 

F = Front 

terminals 

E2B 16 F F I n 1600 A LI 39364 39452 

LSI 39367 39455 LSI 39373 39461 LSI 39379 39467 

LSIG 39370 39458 LSIG 39376 39464 LSIG 39382 39470 

131









E2N 16 F HR I n 1600 A LI 39903 39991 

LSI 39906 39994 LSI 39912 40000 LSI 39918 40006 

LSIG 39909 39997 LSIG 39915 40003 LSIG 39921 40009 

VR = Vertical 


E2N 16 F VR I n 1600 A LI 39925 40013 

LSI 39928 40016 LSI 39934 40022 LSI 39940 40028 

LSIG 39931 40019 LSIG 39937 40025 LSIG 39943 40031 

F = Front 

terminals 

E2N 16 F F I n 1600 A LI 39947 40035 

LSI 39950 40038 LSI 39956 40044 LSI 39962 40050 

LSIG 39953 40041 LSIG 39959 40047 LSIG 39965 40053 






E2L 16 F HR I n 1600 A LI 40452 40540 

LSI 40455 40543 LSI 40461 40549 LSI 40467 40555 

LSIG 40458 40546 LSIG 40464 40552 LSIG 40470 40558 

VR = Vertical 


E2L 16 F VR I n 1600 A LI 40474 40562 

LSI 40477 40565 LSI 40483 40571 LSI 40489 40577 

LSIG 40480 40568 LSIG 40486 40574 LSIG 40492 40580 

F = Front 

terminals 

E2L 16 F F I n 1600 A LI 40496 40584 

LSI 40499 40587 LSI 40505 40593 LSI 40511 40599 

LSIG 40502 40590 LSIG 40508 40596 LSIG 40514 40602 







E2B 20 F HR I n 2000 A LI 39496 39584 

LSI 39499 39587 LSI 39505 39593 LSI 39511 39599 

LSIG 39502 39590 LSIG 39508 39596 LSIG 39514 39601 

VR = Vertical 


E2B 20 F VR I n 2000 A LI 39518 39606 

LSI 39521 39609 LSI 39527 39615 LSI 39533 39621 

LSIG 39524 39612 LSIG 39530 39618 LSIG 39536 39624 

F = Front 

terminals 

E2B 20 F F I n 2000 A LI 39540 39628 

LSI 39543 39631 LSI 39549 39637 LSI 39555 39643 

LSIG 39546 39634 LSIG 39552 39640 LSIG 39558 39646 

132










E2N 20 F HR I n 2000 A LI 40079 40167 

LSI 40082 40170 LSI 40088 40176 LSI 40094 40182 

LSIG 40085 40173 LSIG 40091 40179 LSIG 40097 40185 

VR = Vertical 


E2N 20 F VR I n 2000 A LI 40101 43352 

LSI 40105 43355 LSI 40110 43361 LSI 40116 43367 

LSIG 40107 43358 LSIG 40113 43364 LSIG 40119 43370 

F = Front 

terminals 

E2N 20 F F I n 2000 A LI 40123 40189 

LSI 40126 40192 LSI 40132 40198 LSI 40138 40204 

LSIG 40129 40195 LSIG 40135 40201 LSIG 40141 40207 

133




W = WITHDRAWABLE → E2N 12 I u (40 °C) = 1250A I cu (415 V) = 65kA 



E2N 12 W MP I n 1250 A LI 39759 39875 

LSI 39763 39879 LSI 39771 39887 LSI 39779 39895 

LSIG 39767 39883 LSIG 39775 39891 LSIG 39783 39899 

W = WITHDRAWABLE → E2L 12 I u (40 °C) = 1250A I cu (415 V) = 130kA 



E2L 12 W MP I n 1250 A LI 40292 40424 

LSI 40296 40428 LSI 40304 40436 LSI 40312 40444 

LSIG 40300 40432 LSIG 40308 40440 LSIG 40316 40448 




E2B 16 W MP I n 1600 A LI 39386 39474 

LSI 39389 39477 LSI 39395 39483 LSI 39401 39489 

LSIG 39392 39480 LSIG 39398 39486 LSIG 39404 39492 




E2N 16 W MP I n 1600 A LI 39969 40057 

LSI 39972 40060 LSI 39978 40066 LSI 39984 40072 

LSIG 39975 40064 LSIG 39981 40069 LSIG 39987 40075 




E2L 16 W MP I n 1600 A LI 40518 40606 

LSI 40521 40609 LSI 40527 40615 LSI 40533 40621 

LSIG 40524 40612 LSIG 40530 40618 LSIG 40536 40624 




E2B 20 W MP I n 2000 A LI 39562 39650 

LSI 39565 39653 LSI 39571 39659 LSI 39577 39665 

LSIG 39568 39656 LSIG 39574 39662 LSIG 39580 39668 





E2N 20 W MP I n 2000 A LI 40145 40211 

LSI 40148 40214 LSI 40154 40220 LSI 40160 40226 

LSIG 40151 40217 LSIG 40157 40223 LSIG 40163 40229 

134







code 1SDA0 R1 


E2 W FP HR 37822 37827 

VR = Vertical 


E2 W FP VR 37873 37886 

F = Front 

terminals 

E2 W FP F 37923 37928 

FL = Flat 

terminals 

E2 W FP FL 37973 37978 

135




F = FIXED → E3S 12 I u (40 °C) = 1250A I cu (415 V) = 75kA 





E3S 12 F HR I n 1250 A LI 40889 40949 

LSI 40891 40951 LSI 40895 40955 LSI 40899 40959 

LSIG 40893 40953 LSIG 40897 40957 LSIG 40901 40961 

VR = Vertical 


E3S 12 F VR I n 1250 A LI 40904 40964 

LSI 40906 40966 LSI 40910 40970 LSI 40914 40974 

LSIG 40908 40968 LSIG 40912 40972 LSIG 40916 40976 

F = Front 

terminals 

E3S 12 F F I n 1250 A LI 40919 40979 

LSI 40921 40981 LSI 40925 40985 LSI 40929 40989 

LSIG 40923 40983 LSIG 40927 40987 LSIG 40931 40991 

F = FIXED → E3H 12 I u (40 °C) = 1250A I cu (415 V) = 100kA 





E3H 12 F HR I n 1250 A LI 41489 41549 

LSI 41491 41551 LSI 41495 41555 LSI 41499 41559 

LSIG 41493 41553 LSIG 41497 41557 LSIG 41501 41561 

VR = Vertical 


E3H 12 F VR I n 1250 A LI 41504 41564 

LSI 41506 41566 LSI 41510 41570 LSI 41514 41574 

LSIG 41508 41568 LSIG 41512 41572 LSIG 41516 41576 

F = Front 

terminals 

E3H 12 F F I n 1250 A LI 41519 41579 

LSI 41521 41581 LSI 41525 41585 LSI 41529 41589 

LSIG 41523 41583 LSIG 41527 41587 LSIG 41531 41591 







E3S 16 F HR I n 1600 A LI 41009 41069 

LSI 41011 41071 LSI 41015 41075 LSI 41019 41079 

LSIG 41013 41073 LSIG 41017 41077 LSIG 41021 41081 

VR = Vertical 


E3S 16 F VR I n 1600 A LI 41024 41084 

LSI 41026 41086 LSI 41030 41090 LSI 41034 41094 

LSIG 41028 41088 LSIG 41032 41092 LSIG 41036 41096 

F = Front 

terminals 

E3S 16 F F I n 1600 A LI 41039 41099 

LSI 41041 41101 LSI 41045 41105 LSI 41049 41109 

LSIG 41043 41103 LSIG 41047 41107 LSIG 41051 41111 

136









E3H 16 F HR I n 1600 A LI 41609 41669 

LSI 41611 41671 LSI 41615 41675 LSI 41619 41679 

LSIG 41613 41673 LSIG 41617 41677 LSIG 41621 41681 

VR = Vertical 


E3H 16 F VR I n 1600 A LI 41624 41684 

LSI 41626 41686 LSI 41630 41690 LSI 41634 41694 

LSIG 41628 41688 LSIG 41632 41692 LSIG 41636 41696 

F = Front 

terminals 

E3H 16 F F I n 1600 A LI 41639 41699 

LSI 41641 41701 LSI 41645 41705 LSI 41649 41709 

LSIG 41643 41703 LSIG 41647 41707 LSIG 41651 41711 






E3S 20 F HR I n 2000 A LI 41129 41189 

LSI 41131 41191 LSI 41135 41195 LSI 41139 41199 

LSIG 41133 41193 LSIG 41137 41197 LSIG 41141 41201 

VR = Vertical 


E3S 20 F VR I n 2000 A LI 41144 41204 

LSI 41146 41206 LSI 41150 41210 LSI 41154 41214 

LSIG 41148 41208 LSIG 41152 41212 LSIG 41156 41216 

F = Front 

terminals 

E3S 20 F F I n 2000 A LI 41159 41219 

LSI 41161 41221 LSI 41165 41225 LSI 41169 41229 

LSIG 41163 41223 LSIG 41167 41227 LSIG 41171 41231 







E3H 20 F HR I n 2000 A LI 41729 41789 

LSI 41731 41791 LSI 41735 41795 LSI 41739 41799 

LSIG 41733 41793 LSIG 41737 41797 LSIG 41741 41801 

VR = Vertical 


E3H 20 F VR I n 2000 A LI 41744 41804 

LSI 41746 41806 LSI 41750 41810 LSI 41754 41814 

LSIG 41748 41808 LSIG 41752 41812 LSIG 41756 41816 

F = Front 

terminals 

E3H 20 F F I n 2000 A LI 41759 41819 

LSI 41761 41821 LSI 41765 41825 LSI 41769 41829 

LSIG 41763 41823 LSIG 41767 41827 LSIG 41771 41831 

137









E3L 20 F HR I n 2000 A LI 42089 42149 

LSI 42091 42151 LSI 42095 42155 LSI 42099 42159 

LSIG 42093 42153 LSIG 42097 42157 LSIG 42101 42161 

VR = Vertical 


E3L 20 F VR I n 2000 A LI 42104 42164 

LSI 42106 42166 LSI 42110 42170 LSI 42114 42174 

LSIG 42108 42168 LSIG 42112 42172 LSIG 42116 42176 

F = Front 

terminals 

E3L 20 F F I n 2000 A LI 42119 42179 

LSI 42121 42181 LSI 42125 42185 LSI 42129 42189 

LSIG 42123 42183 LSIG 42127 42187 LSIG 42131 42191 






E3N 25 F HR I n 2500 A LI 40649 40709 

LSI 40651 40711 LSI 40655 40715 LSI 40659 40719 

LSIG 41653 41713 LSIG 40657 40717 LSIG 40661 40721 

VR = Vertical 


E3N 25 F VR I n 2500 A LI 40664 40724 

LSI 40666 40726 LSI 40670 40730 LSI 40674 40734 

LSIG 40668 40728 LSIG 40672 40732 LSIG 40676 40736 

F = Front 

terminals 

E3N 25 F F I n 2500 A LI 40679 40739 

LSI 40681 40741 LSI 40685 40745 LSI 40689 40749 

LSIG 40683 40743 LSIG 40687 40747 LSIG 40691 40751 







E3S 25 F HR I n 2500 A LI 41249 41309 

LSI 41251 41311 LSI 41255 41315 LSI 41259 41319 

LSIG 41253 41313 LSIG 41257 41317 LSIG 41261 41321 

VR = Vertical 


E3S 25 F VR I n 2500 A LI 41264 41324 

LSI 41266 41326 LSI 41270 41330 LSI 41274 41334 

LSIG 41268 41328 LSIG 41272 41332 LSIG 41276 41336 

F = Front 

terminals 

E3S 25 F F I n 2500 A LI 41279 41339 

LSI 41281 41341 LSI 41285 41345 LSI 41289 41349 

LSIG 41283 41343 LSIG 41287 41347 LSIG 41291 41351 

138









E3H 25 F HR I n 2500 A LI 41849 41909 

LSI 41851 41911 LSI 41855 41915 LSI 41859 41919 

LSIG 41853 41913 LSIG 41857 41917 LSIG 41861 41921 

VR = Vertical 


E3H 25 F VR I n 2500 A LI 41864 41924 

LSI 41866 41926 LSI 41870 41930 LSI 41874 41934 

LSIG 41868 41928 LSIG 41872 41932 LSIG 41876 41936 

F = Front 

terminals 

E3H 25 F F I n 2500 A LI 41879 41939 

LSI 41881 41941 LSI 41885 41945 LSI 41889 41949 

LSIG 41883 41943 LSIG 41887 41947 LSIG 41891 41951 






E3L 25 F HR I n 2500 A LI 42209 42269 

LSI 42211 42271 LSI 42215 42275 LSI 42219 42279 

LSIG 42213 42273 LSIG 42217 42277 LSIG 42221 42281 

VR = Vertical 


E3L 25 F VR I n 2500 A LI 42224 42284 

LSI 42226 42286 LSI 42230 42290 LSI 42234 42294 

LSIG 42228 42288 LSIG 42232 42292 LSIG 42236 42296 

F = Front 

terminals 

E3L 25 F F I n 2500 A LI 42239 42299 

LSI 42241 42301 LSI 42245 42305 LSI 42249 42309 

LSIG 42243 42303 LSIG 42247 42307 LSIG 42251 42311 







E3N 32 F HR I n 3200 A LI 40784 43373 

LSI 40786 43375 LSI 40790 43379 LSI 40794 43383 

LSIG 40788 43377 LSIG 40792 43381 LSIG 40796 43385 

VR = Vertical 


E3N 32 F VR I n 3200 A LI 40799 40844 

LSI 40801 40846 LSI 40805 40850 LSI 40809 40854 

LSIG 40803 40848 LSIG 40807 40852 LSIG 40811 40856 

F = Front 

terminals 

E3N 32 F F I n 3200 A LI 40814 40859 

LSI 40816 40861 LSI 40820 40865 LSI 40824 40869 

LSIG 40818 40863 LSIG 40822 40867 LSIG 40826 40871 

139









E3S 32 F HR I n 3200 A LI 41369 41429 

LSI 41371 41431 LSI 41375 41435 LSIG 41379 41439 

LSIG 41373 41933 LSIG 41377 41437 LSIG 41381 41441 

VR = Vertical 


E3S 32 F VR I n 3200 A LI 41384 41444 

LSI 41386 41446 LSI 41390 41450 LSI 41394 41454 

LSIG 41388 41448 LSIG 41392 41452 LSIG 41396 41456 

F = Front 

terminals 

E3S 32 F F I n 3200 A LI 41399 41459 

LSI 41401 41461 LSI 41405 41465 LSI 41409 41469 

LSIG 41403 41463 LSIG 41407 41467 LSIG 41411 41471 







E3H 32 F HR I n 3200 A LI 41969 42029 

LSI 41971 42031 LSI 41975 42035 LSI 41979 42039 

LSIG 41973 42033 LSIG 41977 42037 LSIG 41981 42041 

VR = Vertical 


E3H 32 F VR I n 3200 A LI 41984 42044 

LSI 41986 42046 LSI 41990 42050 LSI 41994 42054 

LSIG 41988 42048 LSIG 41992 42052 LSIG 41996 42056 

F = Front 

terminals 

E3H 32 F F I n 3200 A LI 41999 42059 

LSI 42001 42061 LSI 42005 42065 LSI 42009 42069 

LSIG 42003 42063 LSIG 42007 42067 LSIG 42011 42071 

140




W = WITHDRAWABLE → E3S 12 I u (40 °C) = 1250A I cu (415 V) = 75kA 



E3S 12 W MP I n 1250 A LI 40934 40994 

LSI 40936 40996 LSI 40940 41000 LSI 40944 41004 

LSIG 40938 40998 LSIG 40942 41002 LSIG 40946 41006 

W = WITHDRAWABLE → E3H 12 I u (40 °C) = 1250A I cu (415 V) = 100kA 



E3H 12 W MP I n 1250 A LI 41534 41594 

LSI 41536 41596 LSI 41540 41600 LSI 41544 41604 

LSIG 41538 41598 LSIG 41542 41602 LSIG 41546 41606 




E3S 16 W MP I n 1600 A LI 41054 41114 

LSI 41056 41116 LSI 41060 41120 LSI 41064 41124 

LSIG 41058 41118 LSIG 41062 41122 LSIG 41066 41126 

W = WITHDRAWABLE → E3H 16 Iu (40 °C) = 1600A Icu (415 V) = 100kA 

Microprocessor-based 

release 

PR111 

P 

code 1SDA0 R1 


PR112 

P 

code 1SDA0 R1 


PR112 

PD 

code 1SDA0 R1 


E3H 16 W MP I n 1600 A LI 41654 41714 

LSI 41656 41716 LSI 41660 41720 LSI 41664 41724 

LSIG 41658 41718 LSIG 41662 41722 LSIG 41666 41726 




E3S 20 W MP I n 2000 A LI 41174 41234 

LSI 41176 41236 LSI 41180 41240 LSI 41184 41244 

LSIG 41178 41238 LSIG 41182 41242 LSIG 41186 41246 

W = WITHDRAWABLE → E3H 20 → I u (40 °C) = 2000A I cu (415 V) = 100kA 



E3H 20 W MP I n 2000 A LI 41774 41834 

LSI 41776 41836 LSI 41780 41840 LSI 41784 41844 

LSIG 41778 41838 LSI 41782 41842 LSIG 41786 41846 





E3L 20 W MP I n 2000 A LI 42134 42194 

LSI 42136 42196 LSI 42140 42200 LSI 42144 42204 

LSIG 42138 42198 LSIG 42142 42202 LSIG 42146 42206 

141







E3N 25 W MP I n 2500 A LI 40694 40754 

LSI 40696 40756 LSI 40700 40760 LSI 40704 40764 

LSIG 40698 40758 LSIG 40702 40762 LSIG 40706 40766 




E3S 12 W MP I n 2500 A LI 41294 41354 

LSI 41296 41356 LSI 41300 41360 LSI 41304 41364 

LSIG 41298 41358 LSIG 41302 41362 LSIG 41306 41366 




E3H 25 W MP I n 2500 A LI 41894 41954 

LSI 41896 41956 LSI 41900 41960 LSI 41904 41964 

LSIG 41898 41958 LSIG 41902 41962 LSIG 41906 41966 




E3L 25 W MP I n 2500 A LI 42254 42314 

LSI 42256 42316 LSI 42260 42320 LSI 42264 42324 

LSIG 42258 42318 LSIG 42262 42322 LSIG 42266 42326 




E3N 32 W MP I n 3200 A LI 40829 40874 

LSI 40831 40876 LSI 40835 40880 LSI 40839 40884 

LSIG 40833 40878 LSIG 40837 40882 LSIG 40841 40886 




E3S 32 W MP I n 3200 A LI 41414 41474 

LSI 41416 41476 LSI 41420 41480 LSI 41424 41484 

LSIG 41418 41478 LSIG 41422 41482 LSIG 41426 41486 





E3H 32 W MP I n 3200 A LI 42014 42074 

LSI 42016 42076 LSI 42020 42080 LSI 42024 42084 

LSIG 42018 42078 LSIG 42022 42082 LSIG 42026 42086 

142







code 1SDA0 R1 


E3 W FP HR 37823 37828 

VR = Vertical 


E3 W FP VR 37874 37878 

F = Front 

terminals 

E3 W FP F 37924 37929 

FL = Flat 

terminals 

E3 W FP FL 37974 37979 

143









E4H 32 F HR I n 3200 A LI 42450 43417 

LSI 42452 43419 LSI 42456 43423 LSI 42460 43427 

LSIG 42454 43421 LSIG 42458 43425 LSIG 42462 43429 

VR = Vertical 


E4H 32 F VR I n 3200 A LI 42465 42510 

LSI 42467 42512 LSI 42471 42516 LSI 42475 42520 

LSIG 42469 42514 LSIG 42473 42518 LSIG 42477 42522 

F = Front 

terminals 

E4H 32 F F I n 3200 A LI 42480 42525 

LSI 42482 42527 LSI 42486 42531 LSI 42490 42535 

LSIG 42484 42529 LSIG 42488 42533 LSIG 42492 42537 






E4S 40 F HR I n 4000 A LI 42330 42390 

LSI 42332 42392 LSI 42336 42396 LSI 42340 42400 

LSIG 42334 42394 LSIG 42338 42398 LSIG 42342 42402 

VR = Vertical 


E4S 40 F VR I n 4000 A LI 42345 42405 

LSI 42347 42407 LSI 42351 42411 LSI 42355 42415 

LSIG 42349 42409 LSIG 42353 42413 LSIG 42357 42417 

F = Front 

terminals 

E4S 40 F F I n 4000 A LI 42360 42420 

LSI 42362 42422 LSI 42366 42426 LSI 42370 42430 

LSIG 42364 42424 LSIG 42368 42428 LSIG 42372 42432 







E4H 40 F HR I n 4000 A LI 42555 42615 

LSI 42557 42617 LSI 42561 42621 LSI 42565 42625 

LSIG 42559 42619 LSIG 42563 42623 LSIG 42567 42627 

VR = Vertical 


E4H 40 F VR I n 4000 A LI 42570 42630 

LSI 42572 42632 LSI 42576 42636 LSI 42580 42640 

LSIG 42574 42634 LSIG 42578 42638 LSIG 42582 42642 

F = Front 

terminals 

E4H 40 F F I n 4000 A LI 42585 42645 

LSI 42587 42647 LSI 42591 42651 LSI 42595 42655 

LSIG 42589 42649 LSIG 42593 42653 LSIG 42597 42657 

144







E4H 32 W MP I n 3200 A LI 42495 42540 

LSI 42497 42542 LSI 42501 42546 LSI 42505 42550 

LSIG 42499 42544 LSIG 42503 42548 LSIG 42507 42552 




E4S 40 W MP I n 4000 A LI 42375 42435 

LSI 42377 42437 LSI 42381 42441 LSI 42385 42445 

LSIG 42379 42439 LSIG 42383 42443 LSIG 42387 42447 





E4H 40 W MP I n 4000 A LI 42600 42660 

LSI 42602 42662 LSI 42606 42666 LSI 42610 42670 

LSIG 42604 42664 LSIG 42608 42668 LSIG 42612 42672 




code 1SDA0 R1 


E4 W FP HR 37824 37829 

VR = Vertical 


E4 W FP VR 37875 37879 

F = Front 

terminals 

E4 W FP F 37925 37930 

FL = Flat 

terminals 

E4 W FP FL 37975 37980 

145




F = FIXED → E6V 32 I u (40 °C) = 3200A I cu (415 V) = 150kA 





E6V 32 F HR I n 3200 A LI 42914 42946 

LSI 42915 42947 LSI 42917 42949 LSI 42919 42951 

LSIG 42916 42948 LSIG 42918 42950 LSIG 42920 42952 

VR = Vertical 


E6V 32 F VR I n 3200 A LI 42922 42954 

LSI 42923 42955 LSI 42925 42957 LSI 42927 42959 

LSIG 42924 42956 LSIG 42926 42958 LSIG 42928 42960 

F = Front 

terminals 

E6V 32 F F I n 3200 A LI 42930 42962 

LSI 42931 42963 LSI 42933 42965 LSI 42935 42967 

LSIG 42932 42964 LSIG 42934 42966 LSIG 42936 42968 






E6V 40 F HR I n 4000 A LI 42979 43039 

LSI 42981 43041 LSI 42985 43045 LSI 42989 43049 

LSIG 42983 43043 LSIG 42987 43047 LSIG 42991 43051 

VR = Vertical 


E6V 40 F VR I n 4000 A LI 42994 43054 

LSI 42996 43056 LSI 43000 43060 LSI 43004 43064 

LSIG 42998 43058 LSIG 43002 43062 LSIG 43006 43066 

F = Front 

terminals 

E6V 40 F F I n 4000 A LI 43009 43069 

LSI 43011 43071 LSI 43015 43075 LSI 43019 43079 

LSIG 43013 43073 LSIG 43017 43077 LSIG 43021 43081 







E6H 50 F HR I n 5000 A LI 42675 42735 

LSI 42677 42737 LSI 42681 42741 LSI 42685 42745 

LSIG 42679 42739 LSIG 42683 42743 LSIG 42687 42747 

VR = Vertical 


E6H 50 F VR I n 5000 A LI 42690 42750 

LSI 42692 42752 LSI 42696 42756 LSI 42700 42760 

LSIG 42694 42754 LSIG 42698 42758 LSIG 42702 42762 

F = Front 

terminals 

E6H 50 F F I n 5000 A LI 42705 42765 

LSI 42707 42767 LSI 42711 42771 LSI 42715 42775 

LSIG 42709 42769 LSIG 42713 42773 LSIG 42717 42777 

146









E6V 50 F HR I n 5000 A LI 43099 43159 

LSI 43101 43161 LSI 43105 43165 LSI 43109 43169 

LSIG 43103 43163 LSIG 43107 43167 LSIG 43111 43171 

VR = Vertical 


E6V 50 F VR I n 5000 A LI 43114 43174 

LSI 43116 43176 LSI 43120 43180 LSI 43124 43184 

LSIG 43118 43178 LSIG 43122 43182 LSIG 43126 43186 

F = Front 

terminals 

E6V 50 F F I n 5000 A LI 43129 43189 

LSI 43131 43191 LSI 43135 43195 LSI 43139 43199 

LSIG 43133 43193 LSIG 43137 43197 LSIG 43141 43201 






E6H 63 F HR I n 6300 A LI 42795 42855 

LSI 42797 42857 LSI 42801 42861 LSI 42805 42865 

LSIG 42799 42859 LSIG 42803 42863 LSIG 42807 42867 

VR = Vertical 


E6H 63 F VR I n 6300 A LI 42810 42870 

LSI 42812 42872 LSI 42816 42876 LSI 42820 42880 

LSIG 42814 42874 LSIG 42818 42878 LSIG 42822 42882 

F = Front 

terminals 

E6H 63 F F I n 6300 A LI 42825 42885 

LSI 42827 42887 LSI 42831 42891 LSI 42835 42895 

LSIG 42829 42889 LSIG 42833 42893 LSIG 42837 42897 







E6V 63 F HR I n 6300 A LI 43219 43279 

LSI 43221 43281 LSI 43225 43285 LSI 43229 43289 

LSIG 43223 43283 LSIG 43227 43287 LSIG 43231 43291 

VR = VerticaL 


E6V 63 F VR I n 6300 A LI 43234 43294 

LSI 43236 43296 LSI 43240 43300 LSI 43244 43304 

LSIG 43238 43298 LSIG 43242 43302 LSIG 43246 43306 

F = Front 

terminals 

E6V 63 F F I n 6300 A LI 43249 43432 

LSI 43251 43434 LSI 43255 43438 LSI 43259 43442 

LSIG 43253 43436 LSIG 43257 43440 LSIG 43261 43444 

147




W = WITHDRAWABLE → E6V 32 I u (40 °C) = 3200A I cu (415 V) = 150kA 



E6V 32 W MP I n 3200 A LI 42938 42970 

LSI 42939 42971 LSI 42941 42973 LSI 42943 42975 

LSIG 42940 42972 LSIG 42942 42974 LSIG 42944 42976 




E6V 40 W MP I n 4000 A LI 43024 43084 

LSI 43026 43086 LSI 43030 43090 LSI 43034 43094 

LSIG 43028 43088 LSIG 43032 43092 LSIG 43036 43096 




E6H 50 W MP I n 5000 A LI 42720 42780 

LSI 42722 42782 LSI 42726 42786 LSI 42730 42790 

LSIG 42724 42784 LSIG 42728 42788 LSIG 42732 42792 




E6V 50 W MP I n 5000 A LI 43144 43204 

LSI 43146 43206 LSI 43150 43210 LSI 43154 43214 

LSIG 43148 43208 LSIG 43152 43212 LSIG 43156 43216 




E6H 63 W MP I n 6300 A LI 42840 42900 

LSI 42842 42902 LSI 42846 42906 LSI 42850 42910 

LSIG 42844 42904 LSIG 42848 42908 LSIG 42852 42912 





E6V 63 W MP I n 6300 A LI 43264 43309 

LSI 43266 43311 LSI 43270 43315 LSI 43274 43319 

LSIG 43268 43313 LSIG 43272 43317 LSIG 43276 43321 

148







code 1SDA0 R1 


E6 W FP HR 37825 37830 

VR = Vertical 


E6 W FP VR 37876 37880 

F = Front 

terminals 

E6 W FP F 37926 37931 

FL = Flat 

terminals 

E6 W FP FL 37976 37981 

149




F = FIXED → E1B/MS 08 I u (40 °C) = 800A I cw (1 s) = 36kA 



150 

code 1SDA0 R1 


E1B/MS 08 F HR 37528 37555 

VR = Vertical 


E1B/MS 08 F VR 37587 37583 

F = Front 

terminals 

E1B/MS 08 F F 37698 37695 




code 1SDA0 R1 


E1B/MS 12 F HR 37529 37556 

VR = Vertical 


E1B/MS 12 F VR 37586 37588 

F = Front 

terminals 

E1B/MS 12 F F 37697 37696




W = WITHDRAWABLE → E1B/MS 08 I u (40 °C) = 800A I cw (1 s) = 36kA 

code 1SDA0 R1 


E1B/MS 08 W MP 37639 37642 


code 1SDA0 R1 


E1B/MS 12 W MP 37640 37641 




code 1SDA0 R1 


E1 W FP HR 37821 37826 

VR = Vertical 


E1 W FP VR 37872 37877 

F = Front 

terminals 

E1 W FP F 37922 37927 

FL = Flat 

terminals 

E1 W FP FL 37972 37977 

151




F = FIXED → E2N/MS 12 I u (40 °C) = 1250A I cw (1 s) = 55kA 



152 

code 1SDA0 R1 


E2N/MS 12 F HR 37531 37559 

VR = Vertical 


E2N/MS 12 F VR 37584 37590 

F = Front 

terminals 

E2N/MS 12 F F 37708 37703 




code 1SDA0 R1 


E2B/MS 16 F HR 43472 37557 

VR = Vertical 


E2B/MS 16 F VR 37585 37589 

F = Front 

terminals 

E2B/MS 16 F F 37699 37702 




code 1SDA0 R1 


E2N/MS 16 F HR 37532 37560 

VR = Vertical 


E2N/MS 16 F VR 37593 37594 

F = Front 

terminals 

E2N/MS 16 F F 37707 37704 




code 1SDA0 R1 


E2B/MS 20 F HR 37530 37558 

VR = Vertical 


E2B/MS 20 F VR 37592 37591 

F = Front 

terminals 

E2B/MS 20 F F 37700 37701







code 1SDA0 R1 


E2N/MS 20 F HR 37533 37561 

VR = Vertical 


E2N/MS 20 F VR 37596 37595 

F = Front 

terminals 

E2N/MS 20 F F 37706 37705 

153




W = WITHDRAWABLE → E2N/MS 12 I u (40 °C) = 1250A I cw (1 s) = 55kA 

154 

code 1SDA0 R1 


E2N/MS 12 W MP 37648 37652 


code 1SDA0 R1 


E2B/MS 16 W MP 37646 37643 





code 1SDA0 R1 


E2 W FP HR 37822 37827 

VR = Vertical 


E2 W FP VR 37873 37886 

F = Front 

terminals 

E2 W FP F 37923 37928 

FL = Flat 

terminals 

code 1SDA0 R1 


E2N/MS 16 W MP 37647 37651 


code 1SDA0 R1 


E2B/MS 20 W MP 37645 37644 


code 1SDA0 R1 


E2N/MS 20 W MP 37649 37650 

E2 W FP FL 37973 37978




F = FIXED → E3S/MS 12 I u (40 °C) = 1250A I cw (1 s) = 75kA 



code 1SDA0 R1 


E3S/MS 12 F HR 37536 37564 

VR = Vertical 


E3S/MS 12 F VR 37601 37602 

F = Front 

terminals 

E3S/MS 12 F F 37722 37713 




code 1SDA0 R1 


E3S/MS 16 F HR 37537 37565 

VR = Vertical 


E3S/MS 16 F VR 37610 37603 

F = Front 

terminals 

E3S/MS 16 F F 37721 37714 




code 1SDA0 R1 


E3S/MS 20 F HR 37538 37566 

VR = Vertical 


E3S/MS 20 F VR 37609 37604 

F = Front 

terminals 

E3S/MS 20F F 37720 37715 




code 1SDA0 R1 


E3N/MS 25 F HR 37534 37562 

VR = Vertical 


E3N/MS 25 F VR 37597 37598 

F = Front 

terminals 

E3N/MS 25 F F 37709 37712 

155







156 

code 1SDA0 R1 


E3S/MS 25 F HR 37539 37567 

VR = Vertical 


E3S/MS 25 F VR 37608 37605 

F = Front 

terminals 

E3S/MS 25 F F 37719 37716 




code 1SDA0 R1 


E3N/MS 32 F HR 37535 37563 

VR = Vertical 


E3N/MS 32 F VR 37600 37599 

F = Front 

terminals 

E3N/MS 32 F F 37710 37711 




code 1SDA0 R1 


E3S/MS 32 F HR 37540 37568 

VR = Vertical 


E3S/MS 32 F VR 37607 37606 

F = Front 

terminals 

E3S/MS 32F F 37718 37717




W = WITHDRAWABLE → E3S/MS 12 I u (40 °C) = 1250A I cw (1 s) = 75kA 

code 1SDA0 R1 


E3S/MS 12 W MP 37657 37664 


code 1SDA0 R1 


E3S/MS 16 W MP 37660 37665 





code 1SDA0 R1 


E3 W FP HR 37823 37828 

VR = Vertical 


E3 W FP VR 37874 37878 

F = Front 

terminals 

E3 W FP F 37924 37929 

FL = Flat 

terminals 

code 1SDA0 R1 


E3S/MS 20 W MP 37658 37666 


code 1SDA0 R1 


E3N/MS 25 W MP 37656 37653 


code 1SDA0 R1 


E3S/MS 25 W MP 37661 37662 


code 1SDA0 R1 


E3N/MS 32 W MP 37655 37654 


code 1SDA0 R1 


E3S/MS 32 W MP 37659 37663 

E3 W FP FL 37974 37979 

157




F = FIXED → E4H/MS 32 I u (40 °C) = 3200A I cw (1 s) = 100kA 



158 

code 1SDA0 R1 


E4H/MS 32 F HR 37547 37575 

VR = Vertical 


E4H/MS 32 F VR 37623 37626 

F = Front 

terminals 

E4H/MS 32 F F 37743 37735 




code 1SDA0 R1 


E4S/MS 40 F HR 37546 37574 

VR = Vertical 


E4S/MS 40 F VR 37622 37621 

F = Front 

terminals 

E4S/MS 40 F F 37734 37733 




code 1SDA0 R1 


E4H/MS 40 F HR 37548 37576 

VR = Vertical 


E4H/MS 40 F VR 37624 37625 

F = Front 

terminals 

E4H/MS 40 F F 37742 37736




W = WITHDRAWABLE → E4H/MS 32 I u (40 °C) = 3200A I cw (1 s) = 100kA 

code 1SDA0 R1 


E4H/MS 32 W MP 37682 37679 


code 1SDA0 R1 


E4S/MS 40 W MP 37677 37678 





code 1SDA0 R1 


E4 W FP HR 37824 37829 

VR = Vertical 


E4 W FP VR 37875 37879 

F = Front 

terminals 

E4 W FP F 37925 37930 

FL = Flat 

terminals 

code 1SDA0 R1 


E4H/MS 40 W MP 37681 37680 

E4 W FP FL 37975 37980 

159




F = FIXED → E6H/MS 50 I u (40 °C) = 5000A I cw (1 s) = 100 kA 



160 

code 1SDA0 R1 


E6H/MS 50 F HR 37549 37577 

VR = Vertical 


E6H/MS 50 F VR 37630 37627 

F = Front 

terminals 

E6H/MS 50 F F 37741 37738 




code 1SDA0 R1 


E6H/MS 63 F HR 37550 37578 

VR = Vertical 


E6H/MS 63 F VR 37629 37628 

F = Front 

terminals 

E6H/MS 63 F F 37740 37739





code 1SDA0 R1 


E6H/MS 50 W MP 37683 37686 


code 1SDA0 R1 


E6H/MS 63 W MP 37684 37685 




code 1SDA0 R1 


E6 W FP HR 37825 37830 

VR = Vertical 


E6 W FP VR 37876 37880 

F = Front 

terminals 

E6 W FP F 37926 37931 

FL = Flat 

terminals 

E6 W FP FL 37976 37981 

161


SACE Emax CS 

Isolating truck 

W = WITHDRAWABLE 

162 

I u 1250 

code 1SDA0 R1 


E1 CS 12 W MP 37752 37753 

I u 2000 

code 1SDA0 R1 


E2 CS 20 W MP 37762 37769 

I u 3200 

code 1SDA0 R1 


E3 CS 32 W MP 37763 37768 

I u 4000 

code 1SDA0 R1 


E4 CS 40 W MP 37764 37767 

I u 6300 

code 1SDA0 R1 


E6 CS 63 W MP 37765 37766 

Fixed parts 

See page 165


SACE Emax MTP 

Earthing switch 


earthing of 

top pliers 

earthing of 

bottom pliers 

I u 1250 

code 1SDA0 R1 bottom jaw-type code 1SDA0 R1 

contacts 

3 poles 4 poles 3 poles 4 poles 

E1 MTP 12 W MP 37758 37759 37761 37760 

I u 2000 


contacts 


E2 MTP 20 W MP 37786 37787 37794 37795 

I u 3200 


contacts 


E3 MTP 32 W MP 37789 37788 37796 37797 

I u 4000 


contacts 


E4 MTP 40 W MP 37790 37791 37798 37799 

I u 6300 


contacts 


E6 MTP 63 W MP 37792 37793 37800 37801 

Fixed parts 

See page 165 

earthing of 

top jaw-type 

contacts 

earthing of 

top jaw-type 

contacts 

earthing of 

top jaw-type 

contacts 

earthing of 

top jaw-type 

contacts 

earthing of 

top jaw-type 

contacts 

earthing of 

earthing of 

earthing of 

earthing of 

earthing of 

163


SACE Emax MT 

Earthing truck 


earthing of 

top pliers 

earthing of 

bottom pliers 

164 

I u 1250 


contacts 


E1 MT 12 W MP 37754 37755 37756 37757 

I u 2000 


contacts 


E2 MT 20 W MP 37770 37771 37785 37784 

I u 3200 


contacts 


E3 MT 32 W MP 37773 37772 37782 37783 

I u 4000 


contacts 


E4 MT 40 W MP 37774 37775 37975 37780 

I u 6300 


contacts 


E6 MT 63 W MP 37777 37776 37778 37779 

Fixed parts 

See page 165 

earthing of 

top jaw-type 

contacts 

earthing of 

top jaw-type 

contacts 

earthing of 

top jaw-type 

contacts 

earthing of 

top jaw-type 

contacts 

earthing of 

top jaw-type 

contacts 

earthing of 

earthing of 

earthing of 

earthing of 

earthing of



Fixed parts 

W = WITHDRAWABLE Fixed parts E1 



code 1SDA0 R1 


E1 W FP HR 37821 37826 

VR = Vertical 


E1 W FP VR 37872 37877 

F = Front 

terminals 

E1 W FP F 37922 37927 

FL = Flat 

terminals 

E1 W FP FL 37972 37977 

Fixed parts E2 



code 1SDA0 R1 


E2 W FP HR 37822 37827 

VR = Vertical 


E2 W FP VR 37873 37886 

F = Front 

terminals 

E2 W FP F 37923 37928 

FL = Flat 

terminals 

E2 W FP FL 37973 37978 




code 1SDA0 R1 


E3 W FP HR 37823 37828 

VR = Vertical 


E3 W FP VR 37874 37878 

F = Front 

terminals 

E3 W FP F 37924 37929 

FL = Flat 

terminals 

E3 W FP FL 37974 37979 

165



Fixed parts 

W = WITHDRAWABLE Fixed parts E4 

166 



code 1SDA0 R1 


E4 W FP HR 37824 37829 

VR = Vertical 


E4 W FP VR 37875 37879 

F = Front 

terminals 

E4 W FP F 37925 37930 

FL = Flat 

terminals 

E4 W FP FL 37975 37980 




code 1SDA0 R1 


E6 W FP HR 37825 37830 

VR = Vertical 


E6 W FP VR 37876 37880 

F = Front 

terminals 

E6 W FP F 37926 37931 

FL = Flat 

terminals 

E6 W FP FL 37976 37981




Electrical accessories 

1) Shunt opening/closing release 

E1/6 code 1SDA0 R1 code 1SDA0 R1 

Opening Closing 

24 V– 38286 38296 

30 V ∼ 38287 38297 

48 V ∼ 38288 38298 

60 V ∼ 38289 38299 

110...120 V ∼ 38290 38300 

120...127 V ∼ 38291 38301 

220...240 V ∼ 38292 38302 

240...250 V ∼ 38293 38303 

380...400 V – 38294 38304 

440...480 V – 38295 38305 

The shunt opening release and closing release share the same construction and are therefore interchangeable. 

Their function is determined by the position in which they are mounted on the circuit-breaker. 

2a) Undervoltage release 

E1/6 code 1SDA0 R1 

24 V – 38306 

30 V ∼ 38307 

48 V ∼ 38308 

60 V ∼ 38309 

110...120 V ∼ 38310 

120...127 V ∼ 38311 

220...240 V ∼ 38312 

240...250 V ∼ 38313 

380...400 V ∼ 38314 

440...480 V ∼ 38315 

2b) Electronic time-delay device for undervoltage release 


24...30 V ∼ 38316 

48 V ∼ 38317 

60 V ∼ 38318 

110...115 V ∼ 38319 

220...250 V ∼ 38320 

3) Geared motor for automatic charging of closing springs 


24...30 V ∼ 38321 

48...60 V ∼ 38322 

100...130 V ∼ 38323 

220...250 V ∼ 38324 

Note: supplied as standard with limit contact and microswitch for signalling the closing springs are charged (see Accessory 5c). 

167




168 

4) Signal for overload current releases tripped 


mechanical 38337 

electrical (1) 38338 

(1) Requires mechanical signal as well. 

5a) Electrical signalling of circuit-breaker open/closed 


4 auxiliary contacts (2) 38326 

10 auxiliary contacts (3) (4) 38327 

10 auxiliary contacts (3) (5) 46523 

15 additional auxiliary contacts (6) 43475 

15 additional auxiliary contacts (special version for withdrawable) (6) 48827 

(2) Order for MS-CS-MT-MTP version only. Already included for automatic circuit-breaker. 

(3) Not available with PR112 release. 

(4) Order for MS-CS-MT-MTP version. Order as a loose kit only for automatic circuit-breaker. 

(5) To be ordered mounted only, with automatic circuit-breaker. 

(6) Outside circuit-breaker. Order as alternative to various types of interlock and to accessory 8e. 

For mounting on fixed circuit-breaker requires accessory 10.4 as well (Interlock plate for fixed circuit-breaker). 

5b) Electrical signalling of circuit-breaker connected/isolated for test/ 

isolated 

code 1SDA0 R1 

E1/E6 - 5 auxiliary contacts 38361 

E1/E2 - 10 auxiliary contacts 3 poles 38360 

E1/E2 - 10 auxiliary contacts 4 poles 43467 

E3 - 10 auxiliary contacts 3 poles 43468 

E3 - 10 auxiliary contacts 4 poles 43469 

E4/E6 - 10 auxiliary contacts 3/4 poles 43470 

5c) Contact for signalling closing springs charged 


– 38325 

Note: Order as alternative to geared motor. 

5d) Contact for signalling undervoltage release energised 


1 normally open contact 38340 

1 normally closed contact 38341




6a) Current transformer for neutral conductor outside circuit-breaker 

E1 code 1SDA0 R1 

R250 38269 

R400 38270 

R800 38271 

R1250 38272 


R250 38269 

R400 38270 

R800 38271 

R1250 38272 

R1600 38273 

R2000 38274 


R250 48952 

R400 48953 

R800 38277 

R1250 38278 

R1600 38279 

R2000 38280 

R2500 38281 

R3200 38282 


R2000 38274 

R3200 38275 

R4000 38276 

E6 E6 

code 1SDA0 R1 

R3200 38282 

R4000 38283 

R5000 38284 

R6300 38285 

6b) Homopolar toroid for the main power supply earthing conductor 

In 100 A 48067 

In 250 A 48068 

In 400 A 48069 

In 800 A 48070 

code 1SDA0 R1 

169




170 

Mechanical accessories 



– 38345 


E1/6 - key lock code 1SDA0 R1 

for 1 circuit-breaker (different keys) 38350 

for sets of circuit-breakers (same keys No. 3004222) 38346 




E1/6 - padlock code 1SDA0 R1 

– 38351 

Note: Order as alternative to accessory 9a. 

8b) Circuit-breaker lock in connected/isolated/isolated for test position 

E1/6 - key lock + padlock code 1SDA0 R1 

for 1 circuit-breaker (different keys) 38356 





8c) Accessory for lock in isolated/isolated for test position 


– 38357 

Note: Order as alternative to Accessory 8b. 

8d) Accessory for padlock device for shutters 


– 38363 



– (1) (2) (3) 45039 

(1) order as an alternative to the various types of interlocks and accessory 5a (15 auxiliary contacts) 

(2) the use of accessory 10.2 is necessary for installation 

(3) for fixed circuit-breaker, plate 10.4




9a) Protection cover opening and closing pushbuttons 


– 38343 

Note: Order as alternative to Accessory 8a. 

9b) IP54 protective cover for door 


– 38344 

10.1) Interlock cables for fixed circuit-breakers or fixed parts 


Type Horizontal Vertical 

A 38329 38333 

B 38330 38334 

C 38331 38335 

D 38332 38336 

Note: Order one type of cable for each interlock 

10.2) Interlock for fixed circuit-breaker/moving part of withdrawable circuitbreaker 

Type code 1SDA0 R1 

E1 38366 

E2 38366 

E3 38367 

E4 - 3 poles 38368 

E4 - 4 poles / E6 - 3 poles 43466 

E6 - 4 poles 38369 

Note: Order one accessory for each fixed circuit-breaker/moving part of withdrawable circuit-breaker. 

10.3) Interlock for fixed circuit-breaker/fixed part of withdrawable circuit-breaker 

E1/6 - Type code 1SDA0 R1 

A 38364 

B 38364 

C 38365 

D 38364 

Note: Order one accessory for each fixed circuit-breaker/fixed part of withdrawable circuit-breaker. 

10.4) Interlock plate for fixed circuit-breaker 


– 38358 

Note: Order for fixed circuit-breaker only. 

171



Microprocessor-based releases and current transformer 

Microprocessor-based releases 

E1/6 PR111 code 1SDA0 R1 PR112 code 1SDA0 R1 PR112 code 1SDA0 R1 

P 

P 

PD 

172 

LI 38013 

LSI 38012 LSI 38010 LSI 38008 

LSIG 38011 LSIG 38009 LSIG 38007 

Current transformers 

code 1SDA0 R1 


E1 I n 250 A 38014 38020 

I n 400 A 38015 38021 

I n 800 A 38016 38022 

I n 1250 A 38017 38023 

E2 I n 250 A 38014 38020 

I n 400 A 38015 38021 

I n 800 A 38016 38022 

I n 1250 A 38017 38023 

I n 1600 A 38018 38024 

I n 2000 A 38019 38025 

E3 I n 250 A 48741 48742 

I n 400 A 48743 48744 

I n 800 A 38026 38032 

I n 1250 A 38027 38033 

I n 1600 A 38028 38034 

I n 2000 A 38029 38035 

I n 2500 A 38030 38036 

I n 3200 A 38031 38037 

E4 I n 2000 A 38038 38041 

I n 3200 A 38039 38042 

I n 4000 A 38040 38043 

E6 I n 3200 A 38044 38048 

I n 4000 A 38045 38049 

I n 5000 A 38046 38050 

I n 6300 A 38047 38051



Conversion kit for fixed circuit-breaker or fixed parts 

Kit for converting fixed circuit-breaker 

with horizontal rear terminals to vertical rear terminals 

code 1SDA0 R1 

3 terminals 4 terminals 

for 3 poles for 4 poles 

E1 38052 38057 

E2 38053 38058 

E3 38054 38059 

E4 38055 38060 

E6 38056 38061 

Notes: Each kit fits both upper and lower application. To convert a complete circuit-breaker, order 2 kits. 

Kit for converting fixed circuit-breaker 

with horizontal rear terminals to front terminals 

code 1SDA0 R1 



E1 38062 38067 

E2 38063 38068 

E3 38064 38069 

E4 38065 38070 

E6 38066 38071 


Kit for converting fixed parts 

with horizontal rear terminals to front terminals 

code 1SDA0 R1 



E1 38062 38067 

E2 45031 45035 

E3 45032 45036 

E4 45033 45037 

E6 45034 45038 


173

Due to the continuous development of Standards and materials, the specifications and dimensions in this catalogue may only be 

considered binding on confirmation by ABB SACE L.V. 

174

ABB SACE L.V. SpA 

Head Office: Via Baioni, 35 

24123 Bergamo - Italy 

Tel.: +39 035 395111 

Telex: 301627 ABBSAC I 

Telefax: +39 035 395306-035 395433 

http://www.abb.com 

http://www.abb.com 

ITSLV 604019/011 en

Low voltage air circuit-breakers SACE Emax

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